WiccldCute's blog

The true life of pupil in China
By WiccldCute, history, 3 years ago, In English

Hello! I am a popil come from China. Do you really think it's easy for pupil? Exactly no! For normal, we need to do a plenty of problems(which was called "题海战术" in chinese),in Maths,English and Chinese.For me,I have done a book of 100 pages in the five-day holiday.That makes me really...bad.

My Normal Day 6:40 Get up

7:20 Go to school

7:40 Get to school

8:00~18:00 Have class

18:20 have dinner

18:30~21:30 Have extra lessons

21:30~22:30 OI

22:30~23:30 Homework

23:30~0:30 Homework or sleep

Tired!

Every day,we are under pressure both from study,teacher and parent,I ususlly find my head painful......

Can you inmage?

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Comments Comments (140)
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3 years ago, # |
  Vote: I like it +20 Vote: I do not like it

I'm very tired now,actually I am having class now.

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    3 years ago, # ^ |
      Vote: I like it +9 Vote: I do not like it

    Well, I am sure there is something wrong with you. Even for high school students, almost no one does their homework after 0:00.

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      3 years ago, # ^ |
      ← Rev. 2   Vote: I like it 0 Vote: I do not like it

      That's true. As a senior high school student, I rarely go to bed after 12.30 a.m. unless there is a CF round that day.-

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      3 years ago, # ^ |
        Vote: I like it +16 Vote: I do not like it

      It may be wrong.

      Actually,many good students around me don't sleep until 2:30.

      Or they even get up to study at 3:30.

      But they can still keep a good spirit the whole day.

      We call them "the steel man".

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      3 years ago, # ^ |
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      Well unless you're a big procrastinator like me

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3 years ago, # |
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can you share some of Chinese homework from math and computer?

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    3 years ago, # ^ |
      Vote: I like it -24 Vote: I do not like it

    Okay,the problem I am dong now:$$$2^2003+2003^2 Mod 7 = ?$$$

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      3 years ago, # ^ |
        Vote: I like it -6 Vote: I do not like it

      My latex is bad $$$2^{2003}+2003^2 Mod 7=?$$$

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        3 years ago, # ^ |
        ← Rev. 2   Vote: I like it +67 Vote: I do not like it

        $$$2003^2 \mod 7 = (2003 \mod 7)^2 = 1^2 = 1$$$

        $$$2^{2003} \mod 7 = 2^{2003 \mod 3} \mod 7 = 2^2 \mod 7 = 4$$$

        $$$1 + 4 = 5$$$

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          3 years ago, # ^ |
            Vote: I like it +23 Vote: I do not like it

          Even though your answer is correct, shouldn't it be $$$2^{2003 \mod 6}$$$ as $$$\phi(7) = 6$$$?

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            3 years ago, # ^ |
              Vote: I like it +34 Vote: I do not like it

            $$$\text{ord}_7(2) = 3$$$

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              3 years ago, # ^ |
                Vote: I like it 0 Vote: I do not like it

              can you tell me ord7(2) mean ?

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                3 years ago, # ^ |
                  Vote: I like it +25 Vote: I do not like it

                It's the minimum exponent $$$k > 0$$$ such that $$$7 | 2^k - 1$$$

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            3 years ago, # ^ |
              Vote: I like it +71 Vote: I do not like it

            I think no. See:

            $$$2^0 = 1$$$

            $$$2^1 = 2$$$

            $$$2^2 = 4$$$

            $$$2^3 = 8$$$

            $$$2^4 = 16$$$ etc.

            $$$2^3 = 8 \mod 7 = 1$$$, that's why $$$2^k \mod 7 = 2^{k-3} * 8 \mod 7 = 2^{k-3} * (8 \mod 7) \mod 7 = 2 ^ {k-3} \mod 7$$$

            People of CF, why downvotes lol? You should check the answer, then downvote.

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          3 years ago, # ^ |
            Vote: I like it -22 Vote: I do not like it

          Can you please tell the topic name??...

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        3 years ago, # ^ |
          Vote: I like it +14 Vote: I do not like it

        I'd like to give my opinion about this kind problems. For me it is actually very easy to solve, but I'm impressed since school math problems in my country aren't like that. Also I'm sure most Chileans couldn't be able to solve it without external help.

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3 years ago, # |
  Vote: I like it -92 Vote: I do not like it

Deal with it? You are not the only one you know. There are millions of other kids just like you.

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    3 years ago, # ^ |
      Vote: I like it -18 Vote: I do not like it

    Yes,absolutely,I just want to tell the true life oh students in China

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      3 years ago, # ^ |
      ← Rev. 2   Vote: I like it +5 Vote: I do not like it

      Yes I understand your tiredness. It's kind of a sad life in China. Half of my relatives are from China and they study a lot comparing to me.

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    3 years ago, # ^ |
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    Well, in Russia, the load is clearly much less)

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      3 years ago, # ^ |
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      Because China has more students, and there is more peer preesure accordingly.

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      3 years ago, # ^ |
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      FairyWinx, Can you elaborate on the russian system of education. From which class do you start studing subject of your interest, at what age do you enter college and how many exams do you need to enter the best college. In India, Its much tougher than china as mentioned in the bloag. Your Teachers will ask you to study 15 hours a day if you are preparing for a good engineering college and there is no guarrantee for success(5000 / 1000000 students get a decent college)

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        3 years ago, # ^ |
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        How it looks for an ordinary student — there are 35 hours of classes per week + homework, where all Geography, biology, history, mathematics, Russian, English and so on. And it's all according to a single GOST for the whole country (while extremely lousy and weak, but not the point). And so on until ~ 10th grade (people enter school up to and including 7 years). In the 10th-11th grade, the oin are preparing for the final exam (ЕГЭ), solving essentially the same tasks for 2 years (there the topics of the tasks and their ideas have not changed for many years), well, they enter rather lousy universities (there are extremely few normal universities), mainly just for the sake of cutting the guys off from the army.

        Now about specialized education and the like. There is no such thing from the state itself for the strongest schoolchildren (well, the maximum is just more hours of exam preparation), but you can help with a teacher and you will start doing conditional Olympiad mathematics from ~ 6th grade and start going to regional circles (but there is such a pleasure in an extremely small number of large cities), and there are online circles for everyone like Tinkoff, but you need to go there.

        I can't say anything special about them, you just visit them 1-2 times a week, spend 2-3 hours for a couple, and decide at home how to turn out

        there are also many summer schools of fairly good quality, as well as the Sirius educational center, where it is not difficult for an ordinary hard worker who has achieved something in the Olympiads to pass the selection (while it is not difficult to go there)

        About the top schools. There is a conditional 239, 179, where math is very cool, but they rape there (35 hours according to the instructions of the Russian Federation and a bunch of homework (really a lot) and mugs), there is also a conditional CPM, where you don't really want to go to school at all. Well, if you are a cool Olympiad student, then you miss ~ 20-50 percent of the educational process, and you can skip school a little, because no one wants to expel you)

        As for the Olympiads, there is an All-Russian Olympiad (which gives admission anywhere and there are selections for international competitions and in some regions they even pay well for it), it has a school, municipal, regional, final. The first 2 last ones are good, and the first 2 are made by regions, and it often turns out badly (hello, the most miserable municipal stage from the NSC with offline testing in 2021 and a geoma in which you just need to calculate the coordinates of everything and sort out inf cases). And also more lists for admission.

        There are not so many top universities and there are half of the places for the Olympiads, I don't really understand what can be said about them anymore

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    3 years ago, # ^ |
      Vote: I like it +3 Vote: I do not like it

    You don't have to slap it on his face. A few words of encouragement would have been nice.

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      3 years ago, # ^ |
      ← Rev. 3   Vote: I like it +3 Vote: I do not like it

      I know, I know, what he is experiencing (as well as millions of others in China) are having what I call a harsh education system which has been talked about a lot on the news recently.It's a pity that the Chinese government forces kids to work so hard. But I was just being a bit realistic, that's all. I wasn't "slapping it on his face". Well, half of my relatives in China (I am a Chinese mix) have to deal with this and my parents moved out of China for that specific reason. Hope you understand.No ill intentions here.

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        3 years ago, # ^ |
          Vote: I like it +8 Vote: I do not like it

        The way you phrased it, and now coming up with this reply doesn't match. First one wasn't at all saying what you just said.

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3 years ago, # |
  Vote: I like it +96 Vote: I do not like it

I request mike for a color change of pupil from green to red

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3 years ago, # |
  Vote: I like it -25 Vote: I do not like it

I've only heard that the involution in China is very serious now. I didn't expect it to be so serious...

I'm now a Grade 10 student in China. As a pupil (Not rating in CF) in 2012-2018, I remember I rarely went to bed after 10:00...

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3 years ago, # |
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What proportion of Chinese students prepare for OI?

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    3 years ago, # ^ |
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    Segment tree，DP,Graph,etc.............................

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      3 years ago, # ^ |
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      I want to ask how much percentage of Chinese students prepare for OI.

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        3 years ago, # ^ |
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        3% maybe，but Chinese population is large

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          3 years ago, # ^ |
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          Not that large in fact. See my comment below, actually the percentage is only about $$$0.038\%$$$.

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        3 years ago, # ^ |
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        Now there are about 280 million students in China. Among them there are about 208 million students in primary school, junior high school and senior high school. However, only about 80 thousand of them prepare for OI. The percentage of it is only about $$$0.038\%$$$.

        Thanks hover88 for reminding me.

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          3 years ago, # ^ |
            Vote: I like it +3 Vote: I do not like it

          I think you should include only the students in the eligible age range.

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3 years ago, # |
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What does OI mean ??

Is it a kind of examination?? WiccldCute

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3 years ago, # |
  Vote: I like it +17 Vote: I do not like it

Im from Vietnam, my schedule is same as yours and i think it is normal.

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    3 years ago, # ^ |
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    It makes me sad that this kind of schedule becomes a norm :(

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    3 years ago, # ^ |
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    Not everywhere in Vietnam is like that. I'm from Vietnam and remember when I was in high school, we were only required to study in class in the morning. Other than that, it's you and your family who urge to learn more by going to teacher's extra class. I'm glad that I didn't make it and was able to spend a lot of time with my friends playing football, sports, etc.

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      3 years ago, # ^ |
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      i dont know any gifted school in Vietnam require to study only in the morning

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        3 years ago, # ^ |
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        Not sure but what I experienced come from a normal school, not gifted school.

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        3 years ago, # ^ |
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        Well, HSGS-HUS doesn't.

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        3 years ago, # ^ |
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        I studied in HSGS and only had mandatory classes in the morning. Only trainings for National Olympiad is full days (though it's only 3 hours in morning + 3 hours in afternoon, and you can usually chill / do your own things if you want to).

        Actually in 12th grade I just skipped school for weeks and did my own things.

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3 years ago, # |
  Vote: I like it +5 Vote: I do not like it

Are you preparing for only OI or preparing for OI along side Gaokao.

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    3 years ago, # ^ |
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    How do Indian know Gaokao in China?!

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      3 years ago, # ^ |
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      Is Gaokao tough?

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      3 years ago, # ^ |
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      From Youtube videos...

      I know the following things from Gaokao(correct me if I am wrong)

      1. Its the most important exam for Chinese students
      2. The government take this very seriously and arrange special transport facilities for it. Various norms are also followed to facilitate the exam procedure.
      3. Afer 10th standard , Chinese students leave their village, small districts etc and move to nearby cities to take admission in something known as Maotanchang High School which prepares specifically for Gaokao examination
      4. The Chinese people value their language a lot and hence its a mandatory subject in the Gaokao examination.
      5. Admission to colleges in China takes place only on the basis of Gaokao examination hence every Chinese student has to take it.
      6. People who can afford migrate to different countries such as USA etc to get rid of Gaokao examination...

      This is what I know?? Am I correct

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        3 years ago, # ^ |
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        Is Gaokao harder than JEE?

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          3 years ago, # ^ |
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          obviously...

          Gaokao is the hardest examination in the world

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            19 months ago, # ^ |
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            (no. of students in Gaokao ) > (no. of students in JEE advanced ) (Difficulty of Jee advance ) >> (difficulty of Gaokao) you can just compare by yourself

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3 years ago, # |
← Rev. 2   Vote: I like it +2 Vote: I do not like it

Hello from Russia. I have only 30-60 minutes for CP on every working day QAQ. In other time I am busy with classes and extra classes (and I must do a lot of homework for them).

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3 years ago, # |
  Vote: I like it +13 Vote: I do not like it

Avidly waiting for the next installment of this blog: The true life of a specialist in China.

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3 years ago, # |
  Vote: I like it +8 Vote: I do not like it

As a seventh-grader in China , it's not that annoying really , at least you find classes ( or solving problems ) smh interesting and not that hard

also you will need a lot of practice to reach a higher level , gl bro

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3 years ago, # |
  Vote: I like it +80 Vote: I do not like it

This post makes me so sad. It reminds me of the time when I was in elementary school.

I'm also from China. When I was a pupil, I got up at 6:00 a.m. and must get to school by 7:00 a.m. It was very early. Often it was totally dark when I was going to school.

But in the evening, I didn't have any extra classes as you. So after leaving school at 6:00 p.m., I would do my homework at home or watch some cartoon. After 9:00 pm, I was asked to go to bed.

As you mentioned in your post, I find that you only get 7 hours to sleep per day! Obviously, it is not enough for a pupil. Children under 12 should sleep at least 9 hours a day! I feel so sorry to hear that you suffered from that pressure at such a young age.

I think China's education culture has problems. This kind of hardworking does not work. It's much more important for young children to get enough sleep and do whatever they like.

And also, the distribution of education resources in China is extremely uneven. Now I am working at Beijing. I often see many pupils leave school at 3:00 p.m. These students might be attending the best public schools in China. So they will receive a more modern and humane education.

I envy them to have a such good education so that they can pay much less time on hardworking, but also have fun more and learn more.

Anyway, you are much more excellent than me in elementary school. When I was a pupil, I didn't know OI and didn't know how to write C++ at all until I came to univerisity. And I wasn't brave enough to communicate with others in English in such an international platform.

Wish you good luck.

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    3 years ago, # ^ |
      Vote: I like it +15 Vote: I do not like it

    agree

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    3 years ago, # ^ |
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    Thanks very much

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    3 years ago, # ^ |
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    I really agree with what you said! Indeed, China's involution culture permeates almost every aspect of everyone's life, To tell you the truth, I don't think it's a good thing.

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      3 years ago, # ^ |
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      chinese says that somethinng in china ia bad?????? -500 Credit score for undisciplined citizen

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        3 years ago, # ^ |
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        Although I don't know whether this system exists, I think it's reasonable for dishonest people to be punished.

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3 years ago, # |
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I sympathize with you because I have come to this day

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3 years ago, # |
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I would love to be that kid because I'm not a kid anymore!

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3 years ago, # |
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You and I both are same. Do you know......my parents don't understand what I do in computer...... They think I should study only with books,I dont need to use computer......still life is painfulllll

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    3 years ago, # ^ |
    ← Rev. 2   Vote: I like it +50 Vote: I do not like it

    Howdy cheater!

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      3 years ago, # ^ |
      ← Rev. 2   Vote: I like it -20 Vote: I do not like it

      Howdy Cyber-bully.

      @Anik203745 please report this guy to have his comment deleted. You have no right to publish another person's name like this. Please don't post proof next. I wonder if Mice Mirzaynoz has any thoughts on these blogs as a social medium.

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        3 years ago, # ^ |
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        Howdy Cyber-bully.

        Almost copy-pasted part...

        Well, you've just butchered my whole point :(

        And btw, the CF owner's name is MikeMirzayanov, not MiceMirzayanov.

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      3 years ago, # ^ |
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      LoL

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3 years ago, # |
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8 to 18 class ,

OMG!

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3 years ago, # |
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and when you grow up you will see that 99% of things you learned at school are useless.

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3 years ago, # |
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I thought my program was bad but this is ridiculous.

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3 years ago, # |
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so communist. godspeed

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3 years ago, # |
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Okay. Okay. I know. This might be my own idea, but I think this is a bit of an exaggeration.

I mean, I'm Chinese too, and I'm not experiencing this. Maybe I'm from what's called a "weak province" where there's not much competition in OI. Nevermind. I'm just here to say that I'm experiencing stuff much less than that.

For me, I usually do my homework between classes in school, so that saves lots of time doing homework at school. Also, I think the "extra lessons" thingy isn't necessary if I'm already good enough in those subjects.

And, involution and rat races are really common, and I get your feelings. But, to be honest, I think we should all somehow learn to relax even in such a tired lifestyle. (also, isn't it holiday?)

Downvote all you want. I'm just talking a truth from my perspective.

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    3 years ago, # ^ |
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    I know QwQ. I come from Jiangsu ,you know... Inside roll （内卷) is exactly serious, what our English class teaches us is the knowloedge of CET... Anyway,I usually do my homework in school...Do you now NFLS?(南京外国语学校） All of learning is for that!!!!!!!!

    --- Actually,my parent are kind,the allow me play games during National Days' Holiday.

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      3 years ago, # ^ |
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      You forgot to spell the full name of your school: Nanjing Foreign Language School

      To tell the truth, there are many strong people in this school. You can ask them for some solving-problem skills and exam-taking skills.

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      3 years ago, # ^ |
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      Inside roll lol. The correcting saying is "Involution".

      And just don't try to translate Chinese meme into English if it can be avoided imo, although there is a so-called somehow correct translation "Involution". It just extremely difficult to understand a meme when you're not in that culture.

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3 years ago, # |
  Vote: I like it -8 Vote: I do not like it

You're just a pupil,there are no large-scale selective examinations, such as the college entrance examination ...... So the life of a junior high school student will be even worse.

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3 years ago, # |
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This lifestyle sounds a lot like mine, maybe others can feel familiar too.

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3 years ago, # |
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take some 2-3 coding problems(medium) and think about them during those 8:00 to 18:00 hours

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3 years ago, # |
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Your Social Credit Score has decreased!- Please refrain from making more of these comments, or we will have to send a Re-education Squad to your location. Thank you! Glory to the CCP!

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    3 years ago, # ^ |
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    LMFAO Is this some troll account??

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    3 years ago, # ^ |
      Vote: I like it +28 Vote: I do not like it

    Don't discuss politics in codeforces, plz.

    Our political views may be different, but we can seek common ground while reserving differences.

    Codeforces is an academic website, not a website to spread political views.

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3 years ago, # |
← Rev. 2   Vote: I like it +15 Vote: I do not like it

That's true. :(

An example of problem I was doing:

Calculate: $$$\left\lfloor(\sqrt2+\sqrt3)^4\right\rfloor$$$

But at least I like it :)

QwQ

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    3 years ago, # ^ |
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    the answer is floor(2*2+4*(sqrt(3)*sqrt(2)*2)+6*3*2+4*(sqrt(3)*sqrt(2)*3)+3*3)=floor(49+20*sqrt(6))=49+floor(sqrt(2400))=49+48=97.

    Am I right? I'm in Grade Five,the same city.

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      3 years ago, # ^ |
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      %%%,Are you the youngest Div1 in the world?%%%

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        3 years ago, # ^ |
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        yes(to mean the answer),and there is a simpler solution using conjugate radicals.

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          3 years ago, # ^ |
            Vote: I like it 0 Vote: I do not like it

          Your maths is so great!

          My English is bad, even doesn't reach PET……

          I haven't learnt conjugate radicals, but I find another solution: floor((sqrt(2)+sqrt(3)^4)

          =floor(x^2),x=(sqrt(2)+sqrt(3))^2.

          So,x=2+3+2sqrt(2)sqrt(3)=5+sqrt(24)

          The answer is floor(x^2)

          =floor(5*5+24+2*5sqrt(24))

          =49+floor(2400)

          also=97.

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            3 years ago, # ^ |
              Vote: I like it 0 Vote: I do not like it

            Yes, they're both calculating the result and then round down.

            My solution:

            We know $$$(\sqrt2+\sqrt3)^4+(\sqrt3-\sqrt2)^4=98$$$ (Calculate it and found all the roots disappearing)

            We know $$$(\sqrt3-\sqrt2)^4$$$ is a very small positive number, so the answer is $$$97$$$.

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              3 years ago, # ^ |
                Vote: I like it 0 Vote: I do not like it

              Wow,what a great method!

              I can prove this: (a+b)^4+(a-b)^4=(a^4+4ab^3+6a^2b^2+4a^3b+b^4)+(a^4-4a^3*b+6a^2*b^2-4ab^3+b^4)=2(a^4+b^4)+12(a^2*b^2)

              So, (sqrt(2)+sqrt(3))^4+(sqrt(3)-sqrt(2))^4=2*(2^2+3^2)+12*(2*3)=26+72=98,right?

              And (a+b)^n+(a-b)^n=sum of all the f(k) fits k<n,k mod 2 is 0,f(i)=a^i*b^(n-i)*2*n!/(k!)/(n-k),when n mod 2 is 0, right?(I'm working out what is it if n is odd)

              (I don't know how to use latex on codeforces)

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                3 years ago, # ^ |
                  Vote: I like it 0 Vote: I do not like it

                To use $$$\LaTeX$$$:

                To use $$$\LaTeX$$$:
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    3 years ago, # ^ |
      Vote: I like it +5 Vote: I do not like it

    Me : Find all positive real numbers $$$x$$$,$$$y$$$ , so that $$$x+\frac{1}{x}+y+\frac{1}{y}+4=2 \sqrt{2x+1}+2 \sqrt{2y+1}$$$

    I am Grade Six.

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      20 months ago, # ^ |
      ← Rev. 2   Vote: I like it 0 Vote: I do not like it

      I'm Grade 8.

      So hard!

      I have a stange way to solve it.

      Let $$$f(x)=x+\dfrac{1}{x}+2-2\sqrt{2x+1}$$$.

      $$$g(x)=x+2+\sqrt{2}-\Big(\sqrt{2}+1\Big)\sqrt{2x+1},h(x)=\dfrac{1}{x}-\sqrt{2}+\Big(\sqrt{2}-1\Big)\sqrt{2x+1}$$$, then $$$f(x)=g(x)+h(x)$$$.

      we have $$$g'(x)=\dfrac{-\sqrt{2}+\sqrt{2x+1}-1}{\sqrt{2x+1}}=1-\dfrac{\sqrt{2}+1}{\sqrt{2x+1}}$$$

      so $$$g'(x)\ge0$$$ if and only $$$\dfrac{\sqrt{2}+1}{\sqrt{2x+1}}\le 1,\sqrt{2}+1\le\sqrt{2x+1}$$$, so $$$2x+1\ge 3+2\sqrt{2}$$$, that is, $$$x\ge\sqrt{2}+1$$$.

      So $$$\arg\min{g(x)}={\sqrt{2}+1}$$$, when $$$x=\sqrt{2}+1$$$, $$$g(x)=0$$$, and $$$g(x)\ge0$$$ for all $$$x$$$.

      and $$$h'(x)=\dfrac{\sqrt{2}x^2-x^2-\sqrt{2x+1}}{x^2\sqrt{2x+1}}$$$, because $$$x^2\sqrt{2x+1}>0$$$, so $$$h'(x)\ge0$$$ if and only $$$\Big(\sqrt{2}-1\Big)x^2-\sqrt{2x+1}\ge0$$$, that is $$$\Big(\sqrt{2}-1\Big)x^2\ge\sqrt{2x+1}$$$, $$$\dfrac{\Big(\sqrt{2}-1\Big)x^2}{\sqrt{2x+1}}\ge 1$$$, $$$\dfrac{x^2}{\sqrt{2x+1}}\ge\sqrt{2}+1$$$.

      Because $$$\sqrt{2x+1}>0$$$, so it equals to $$$x^2-\Big(\sqrt2+1\Big)\sqrt{2x+1}\ge 0$$$, $$$P(x)=\Big(\sqrt{2}-1\Big)x^2-\sqrt{2x+1}\ge0$$$.

      It's easy to see $$$P(x)$$$ is continous, that us see when will $$$P(x)=0$$$.

      $$$\Big(3-2\sqrt{2}\Big)x^4=2x+1$$$

      Obverse to get $$$x=\sqrt{2}+1$$$ is a root, are there any other roots?

      No!

      because $$$P'(x)=4\Big(3-2\sqrt{2}\Big)x^3-2$$$, so $$$P(x)$$$ is getting smaller when $$$x\le\dfrac{1}{2(3-2\sqrt{2})}$$$, and getting bigger when $$$x>\dfrac{1}{2(3-2\sqrt{2})}$$$, because $$$\sqrt{2}+1$$$ is bigger than $$$\dfrac{1}{2(3-2\sqrt{2})}$$$ and when $$$x=0$$$, $$$P(x)>0$$$, so $$$P(x)=0$$$ if and only $$$x=\sqrt{2}+1$$$, so $$$P(x)\ge0$$$ if and only $$$x\ge\sqrt{2}+1$$$.

      so $$$h'(x)\ge0$$$ if and only $$$x\ge\sqrt{2}+1$$$.

      so $$$\arg\min h(x)={\sqrt{2}+1}$$$, in this time, $$$h(x)=0$$$, and $$$h(x)\ge0$$$ for all $$$x$$$.

      so $$$f(x)=g(x)+h(x)\ge0$$$, it equals to $$$0$$$ if and only $$$x=\sqrt{2}+1$$$.

      We solve it!

      $$$f(x)\ge 0,f(y)\ge0,f(x)+f(y)=0$$$, it says what! it says $$$f(x)=f(y)=0$$$!

      so $$$x=y=\sqrt{2}+1$$$, yeeh!

      What a big work! I'm a $$$\rm\LaTeX$$$ master!

      upd:

      Many people downvoted it... I have a much easy solution!

      $$$f(x)=x+\dfrac{1}{x}+2-2\sqrt{2x+1}$$$, $$$f"(x)=\dfrac{2x^3+2\sqrt{2x+1}(2x+1)}{x^3\sqrt{2x+1}(2x+1)}>0$$$, find that $$$f'(\sqrt{2}+1)=0$$$, so $$$\arg\min f(x)=\sqrt{2}+1$$$, $$$f(\sqrt{2}+1)\ge 0$$$ and equals only in $$$x=\sqrt{2}+1$$$, $$$f(x)+f(y)=0$$$ so $$$f(x)=f(y)=0$$$, so $$$x=y=\sqrt{2}+1$$$.

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        19 months ago, # ^ |
        ← Rev. 2   Vote: I like it +8 Vote: I do not like it

        Bro, this is 6th grade math. Just use AM/GM inequality:

        $$$1/2 (x + (1/x + 2)) \geq \sqrt{1 + 2x}$$$, and

        $$$1/2 (y + (1/y + 2)) \geq \sqrt{1 + 2y}$$$.

        Add them side-wise and you get that the right-hand side is (almost) always smaller then the left-hand side in the original equation. Thus, the only solutions must be whenever the inequalities are equalities, so they are the positive solutions to the equation $$$x = 1/x + 2$$$ and $$$y = 1/y + 2$$$. Which means that $$$x = y = 1 + \sqrt 2$$$ (simple quadratic equation).

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3 years ago, # |
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How do the students who become LGM at a very young age in China study? I mean how do they find so much time for it. I am just curious.

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    3 years ago, # ^ |
      Vote: I like it +20 Vote: I do not like it

    In China, OI contestants in many schools will stop classes for training for a period of time before important competitions like CSP in China. Every day of training is programming.

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3 years ago, # |
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Oh, the only advice that may help you: remember, that Hard Work Pays Off!

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    3 years ago, # ^ |
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    Hard work does not pay off at least not as much as privilege, communication skills, straight body and a pretty face! Hard work is the bullshit the capitalists have fed us to keep their mechanical turks clocking. It infuriates me when I see my brothers and sisters stuck in this loop, MXM! The geeks will inherit the earth one way or the other, Boomers can GTH

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      3 years ago, # ^ |
      ← Rev. 2   Vote: I like it +19 Vote: I do not like it

      if you failed in your life even with hard work that does not mean all the people on earth can not get results with hard work and that is how china will rule the world soon by and put an end to US abomination by putting it's resources at max limit , and do you think people in EU and US are the ones who do the real jobs? open your eyes and look at all the academic results that US have , most of IMO , IOI students in USA are chinese , it's so easy for a top 100 student in china to be top 5 in any EU country , look at MIT students , again most of them are top students from china which have remark able results and get funded, you think with sitting there and wasting your time with useless things in life you will get to any good thing? sure being a pretty female , or having a rich dad will put you a head in life but i seen far far more like this people which will fall behind at the end.

      before china , there was not a single country that can bullies USA and do you think that power coming from where , rich dads and pretty females? lmao get real.

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3 years ago, # |
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    3 years ago, # ^ |
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    Well, as an adult, we have 60-72hr/w job, instead of 40hr/w.

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3 years ago, # |
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hope everything gets better.

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3 years ago, # |
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Kids in China are having more difficult life now, I indulged in computer games until my grade 9. Can't really imagine a pupil could spend so much time on studying.

I am now a year 4 undergraduate, learning some competitive programming during my free time, sometimes I regret not knowing about OI during my young age.

OIer have huge advantages when they get into college, I think so at least. Your hardwork will get paid, no worries.

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3 years ago, # |
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i am from East Asia , that is true i can not imagine how it will be to study that much in china, but i can confirm that it is a norm in East Asia , most of people might say that is a really bad thing , but useless things that you study aside , the amount of math and physics that i was studied in high school was easily matched the things people study in university in EU and USA those are pretty valuable things , you can even see that most of East asia countries dominant in IMO / IOI , if you study and focus on important subjects that you like math/physics/chemistry/.... (focus on the one you like other than that every thing is irrelevant you just need to pass the other subjects with minimum score imo) you can easily rest in university because most of the topics are based on the things that you will study before university and you con put that time in university on any thing you want.

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3 years ago, # |
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It's always very sad to hear the forceful work Chinese kids people have to do :( Hope the situation gets better soon.

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3 years ago, # |
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This is so true, It hurts to think of the thousands of hours of my life I wasted studying stupid nonsense in school.

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3 years ago, # |
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My past normal school day Wake up 5:40 6:20 go to school Get to school 7:45 (including 20 minute of runnig with uniform) 8:00-16:00 have ~16:15 eat some snacks 16:30-19:00 CP training or Judo (based on day is even or odd) 21:00-22:00 cameback home, have dinner, feed my dogs homework untill 01:00 and JO repeat (also I spend all weekend helping my father with outside works dig, shuffle stones, pour cement)

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3 years ago, # |
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You are too naive. Only one hour homework.

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3 years ago, # |
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It's the same routine across Asia, India in particular(I know people with an even more taxing schedule). The only thing probably I can relate with Chinese.

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    3 years ago, # ^ |
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    I know people with an even more taxing schedule

    How old are these people you are talking about?

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3 years ago, # |
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As a Chinese student who is in Grade 9, I have the experience mentioned above every day. However, we not only have subjects like Maths, Chinese and English, but also have main subjects like Phisics, Chemistry and so on. Luckily I still have a little time for OI (you may regard it as solving problems) so I still feel energetic every night:(

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3 years ago, # |
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I'm a college student from China now.I thought that it would be relaxing when I was a high school student.But the fact tells me,I'm wrong.

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3 years ago, # |
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University student now. However when in high school, I woke up at 6:00 everyday and sleep after 0:00 the next day. Everyday I study for at least 14 hours( at least! ) even on weekends. Fortunately I was finally admitted to HNU. I had not ever heard OI or ICPC/CCPC until entered university, hah.

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3 years ago, # |
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No lunch?

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3 years ago, # |
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Yes, we can only sleep for 4hs.

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3 years ago, # |
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Ironically, I'm more productive on days when I work for fewer hours and sleep more.

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3 years ago, # |
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...

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3 years ago, # |
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That's basically the condition of Asia , where education drives us and not the latter. Especially in China , Russia as well as South East Asia. I mean in our country , 50000 students apply for 900 seats in an university. That's how tough it gets.

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    3 years ago, # ^ |
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    A competitive environment is actually not good for student's creativity.

    The majority of the Chinese are well-educated thanks to this system though.

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3 years ago, # |
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Hi a popil come from China, I am haochenkang!

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23 months ago, # |
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Bruv, this is motivating

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19 months ago, # |
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Damn people in China are lucky — you don't have to make yourself solve problems a lot and control your time, other people do it for you

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19 months ago, # |
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I think this in Egypt only seems like a common problem :)......

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