We invite you to participate in CodeChef’s Starters118, this Wednesday, 24th January, rated for till 5-Stars (ie. for users with rating < 2200).

Time: 8:00 PM — 10:00 PM IST

Joining us on the problem setting panel are:

• Setters: Kanhaiya notsoloud1 Mohan, S.Manuj DarkSparkle Nanthan, Mamalesh Mamalesh Rajkumar Hake, Maksym mshcherba Shcherba

• Tester: Shreyan Dominater069 Ray

• Statement Verifier: Kanhaiya notsoloud1 Mohan
• Text Editorialists:Nishank IceKnight1093 Suresh

Written editorials will be available for all on discuss.codechef.com. Pro users can find the editorials directly on the problem pages after the contest. The video editorials of the problems will be available only to Pro users.

Also, if you have some original and engaging problem ideas, and you’re interested in them being used in CodeChef's contests, you can share them here.

Hope to see you participating.

Good Luck!

Hi all,

As you know, we had taken a break from hosting contests due to a migration in our checkers. The work is done, and to test, we held an unrated long contest last week. We have an unrated short contest today. If all goes well, we will start the rated contests from next Wednesday.

Today's contest link — https://www.codechef.com/SEP23

It will be for 2 hours, from 8pm to 10pm IST on 6th Sept, Wed.

We expect Div-4 and Div-3 users to benefit from solving the problems, but we encourage everyone to try the contest!

All problems are by Nishank IceKnight1093 Suresh.

Written editorials will be available for all on discuss.codechef.com. Pro users can find the editorials directly on the problem pages after the contest. The video editorials of the problems will be available only to Pro users.

Also, if you have some original and engaging problem ideas, and you’re interested in them being used in CodeChef's contests, you can share them here.

Hope to see you participating.

Good Luck!

Hi all,

As you know, we had taken a break from hosting contests due to a migration in our checkers. We are now mostly done with it, and are restarting contests from today.

As a test run, the first contest will be a long contest and will be unrated for all.

Contest link — https://www.codechef.com/AUG23

It will be for 12 hours, from 12pm noon IST to midnight on 30th Aug, Wed.

Joining us on the problem setting panel are:

• Setters: Ishaan Ishaan_23 Oberoi, Mikey Mikey_03, Nishank IceKnight1093 Suresh

• Testers: Nishank IceKnight1093 Suresh

• Statement Verifier: Nishank IceKnight1093 Suresh

• Text Editorialists: Nishank IceKnight1093 Suresh

• Contest Admin: Nishank IceKnight1093 Suresh

Written editorials will be available for all on discuss.codechef.com. Pro users can find the editorials directly on the problem pages after the contest.

The video editorials of the problems will be available for all users for 1 day as soon as the contest ends, after which they will be available only to Pro users.

Also, if you have some original and engaging problem ideas, and you’re interested in them being used in CodeChef's contests, you can share them here.

Hope to see you participating.

Good Luck!

We invite you to participate in CodeChef’s Starters 92, this Wednesday, 31st May, rated till 6-stars Coders (ie. for users with rating < 2500).

Time: 8:00 PM — 10:00 PM IST

Note that the duration is 2 hours. Read about the recent CodeChef changes here.

Joining us on the problem setting panel are:

• Setters: Irmuun Irmuun.Ch Chinbat, Souradeep souradeep.99 Paul, Shikhar TheDarkKnight Agrawal, Ayush Ayu_19 Kumar, Shaurya Shaurya_Bhalla Bhalla, Ziad ZiadEl-Gafy El-Gafy

• Testers: Nishank IceKnight1093 Suresh

• Video Editorialists: Madhav jhamadhav Jha, Suraj jhasuraj01 Jha, Jwala jwalapc , Adhish ak2006 Kancharla, Pravin pravin_as Shankhapal

• Text Editorialists: Nishank IceKnight1093 Suresh

Note: Some problems have subtasks.

Written editorials will be available for all on discuss.codechef.com. Pro users can find the editorials directly on the problem pages after the contest.

The video editorials of the problems will be available for all users for 1 day as soon as the contest ends, after which they will be available only to Pro users.

Also, if you have some original and engaging problem ideas, and you’re interested in them being used in CodeChef's contests, you can share them here.

Hope to see you participating. Good Luck!

We invite you to participate in CodeChef’s Starters 91, this Wednesday, 24th May, rated till 6-stars Coders (ie. for users with rating < 2500).

Time: 8:00 PM — 10:00 PM IST

Note that the duration is 2 hours. Read about the recent CodeChef changes here.

Joining us on the problem setting panel are:

• Setters: M.Sohel Traverser_25, Souradeep souradeep.99 Paul, Jatin rivalq Garg, emptypromises empty-promises, Danny dannyboy20031204 Boy, Ani Chimpanzee, Yash yash_daga Daga

• Testers: Nishank IceKnight1093 Suresh

• Video Editorialists: Madhav jhamadhav Jha, Suraj jhasuraj01 Jha, Jwala jwalapc , Adhish ak2006 Kancharla, Pravin pravin_as Shankhapal

• Text Editorialists: Nishank IceKnight1093 Suresh

Note: Some problems have subtasks.

Written editorials will be available for all on discuss.codechef.com. Pro users can find the editorials directly on the problem pages after the contest.

The video editorials of the problems will be available for all users for 1 day as soon as the contest ends, after which they will be available only to Pro users.

Also, if you have some original and engaging problem ideas, and you’re interested in them being used in CodeChef's contests, you can share them here.

Hope to see you participating. Good Luck!

We invite you to participate in CodeChef’s Starters 87, this Wednesday, 26th April, rated till 6-stars Coders (ie. for users with rating < 2500).

Time: 8:00 PM — 10:00 PM IST

Note that the duration is 2 hours. Read about the recent CodeChef changes here.

Joining us on the problem setting panel are:

• Setters: Utkarsh Utkarsh.25dec Gupta, Abhinav abhi_inav Gupta, Shubham shubhamgrg1000 Garg, Misha applepi216 Ivkov

• Tester: Takuki tabr Kurokawa

• Community Testers: Rudro Rudro25 Debnath, anky_301, Kashyap zxy0909 Panchani, Preet preet_25 Sheth, Rangey 18o3 Raghav, Vsevolod sevlll777 Lepeshov

• Statement Verifier: Kanhaiya notsoloud1 Mohan

• Video Editorialists: Sundar K Letscode_sundar, Madhav jhamadhav Jha, Suraj jhasuraj01 Jha, Jwala jwalapc

• Text Editorialist: Nishank IceKnight1093 Suresh

• Contest Admin: Utkarsh Utkarsh.25dec Gupta

Written editorials will be available for all on discuss.codechef.com. Pro users can find the editorials directly on the problem pages after the contest.

The video editorials of the problems will be available for all users for 1 day as soon as the contest ends, after which they will be available only to Pro users.

Also, if you have some original and engaging problem ideas, and you’re interested in them being used in CodeChef's contests, you can share them here.

Hope to see you participating. Good Luck!

We invite you to participate in CodeChef’s Starters 85, this Wednesday, 12th April, rated till 6-stars Coders (ie. for users with rating < 2500). This contest is organized by Programming Club, DAIICT.

Time: 8:00 PM — 10:15 PM IST

Note that the duration is 2 hours 15 minutes. Read about the recent CodeChef changes here.

Joining us on the problem setting panel are:

• Setters: Deep Deep_Kanani Kanani, Kashyap zxy0909 Panchani, Preet preet_25 Sheth, Kunj kunj_patel Patel, Jalp Jalppatel1428 Patel

• Testers: Takuki tabr Kurokawa, Yash yash_daga Daga

• Statement Verifier: Kanhaiya notsoloud1 Mohan

• Video Editorialists: Sundar K Letscode_sundar, Madhav jhamadhav Jha, Suraj jhasuraj01 Jha, Jwala jwalapc, Rohit ezo_tihor Oze

• Text Editorialists: Nishank IceKnight1093 Suresh

• Contest Admins: Jatin rivalq Garg

Written editorials will be available for all on Discuss. Pro users can find the editorials directly on the problem pages after the contest.

The video editorials of the problems will be available for all users for 1 day as soon as the contest ends, after which they will be available only to Pro users.

Also, if you have some original and engaging problem ideas, and you’re interested in them being used in CodeChef's contests, you can share them here.

Hope to see you participating. Good Luck!

We invite you to participate in CodeChef’s Starters 59, this Wednesday, 5th October, rated for Div 2, 3 & 4 Coders.

Time: 8 PM — 11:00 PM IST

Joining us on the problem setting panel are:

• Setters: Kanhaiya notsoloud1 Mohan, S.Manuj DarkSparkle Nanthan, Arpit Dutt ashwathamaa Dixit, Subhash isheoran Sheoran, Arul flamestorm Kolla, wuhudsm wuhudsm, Mradul mradul12 Bhatnagar

• Testers: Takuki tabr Kurokawa

• Statement Verifier: Kanhaiya notsoloud1 Mohan

• Editorialists:Nishank IceKnight1093 Suresh

The video editorials of the problems will be available for all users for 1 day as soon as the contest ends, after which they will be available only to Pro users.

Also, if you have some original and engaging problem ideas, and you’re interested in them being used in CodeChef's contests, you can share them here.

Hope to see you participating. Good Luck!

We invite you to participate in CodeChef’s LTIME111, this Monday, 22nd August, rated for all.

Time: 8 PM — 11:00 PM IST

• Admins: Anton antontrygubO_o Trygub, Yahor 244mhq Dubovik

• Setters: Ashish Kryptonix Gangwar, Omkar triggered_code Tripathi, Sachin I_Love_you_Tithi Deb, Prasant prasant21 Kumar, S.Manuj DarkSparkle Nanthan, Akib Finral_eCia Tonnoy, Mradul bhatnagar.mradul Bhatnagar, Alex Um_nik Danilyuk

• Tester: Harris gamegame Leung

• Editorialist: Nishank IceKnight1093 Suresh

The written editorials will be available in the ‘Solutions’ tab of each problem once the contest ends.

The video editorials of the problems will be available for all users for 1 day as soon as the contest ends, after which they will be available only to Pro users.

Also, if you have some original and engaging problem ideas, and you’re interested in them being used in CodeChef's contests, you can share them here.

Hope to see you participating. Good Luck!

We invite you to participate in CodeChef’s Starters 52, this Wednesday, 17th August, rated for Div 3 & 4 Coders.

Time: 8 PM — 11:00 PM IST

• Setters: Utkarsh Utkarsh.25dec Gupta, Souradeep souradeep.99 Paul, Tejas tejas10p Pandey, Ram Gopal grayhathacker Pandey, S.Manuj DarkSparkle Nanthan, Akshit akshitm16 Monga

• Testers: Utkarsh Utkarsh.25dec Gupta, Takuki tabr Kurokawa

• Editorialist: Nishank IceKnight1093 Suresh

The written editorials will be available in the ‘Solutions’ tab of each problem once the contest ends.

The video editorials of the problems will be available for all users for 1 day as soon as the contest ends, after which they will be available only to Pro users.

Also, if you have some original and engaging problem ideas, and you’re interested in them being used in CodeChef's contests, you can share them here.

Hope to see you participating. Good Luck!

Update: The contest has been postponed to tomorrow — 1st March. Apologies for the inconvenience.

We invite you to participate in CodeChef’s February Lunchtime, this Monday, 28th February, rated for all.

Time: 8:00 PM — 11:00 PM IST

Joining me on the problem setting panel are:

• Setters: Ashley errorgorn Khoo, Manuj DarkSparkle Nanthan, Flamestorm153 flamestorm, Hazem zoooma13 Tarek, Daanish Mahajan, Prasant prasant21 Kumar, Utkarsh Utkarsh.25dec Gupta, Kanhaiya notsoloud1 Mohan, Tia Shi maomao90 Wei

• Tester: Harris gamegame Leung

• Head Admin: Alex Um_nik Danilyuk

• Statement Verifier: Kanhaiya notsoloud1 Mohan

• Admin: Anton antontrygubO_o Trygub, Yahor 244mhq Dubovik

• Editorialists: Aman Retired_cherry Dwivedi, Trung Đặng Kuroni Đoàn Đức

Note that this Lunchtime will not have Subtasks.

The video editorials of the problems will be available on our YouTube channel as soon as the contest ends. Subscribe to get notifications about our new editorials.

Also, if you have some original and engaging problem ideas, and you’re interested in them being used in CodeChef's contests, you can share them here.

Hope to see you participating. Good Luck!

We invite you to participate in CodeChef’s February Cook-Off, this Monday, 21st February, rated for all.

Time: 8 PM — 10:30 PM IST

Joining me on the problem setting panel are:

• Setters: Utkarsh Utkarsh.25dec Gupta, Hazem zoooma13 Tarek, Jeevan Jyot JeevanJyot Singh, Manuj DarkSparkle Nanthan, Nabil Boredom Boudra, Flamestorm flamestorm, Yahor 244mhq Dubovik, Leung arvindf232 Arvin, Cozma tibinyte Tiberiu-Stefan, Aruj arujbansal Bansal

• Testers: Harris gamegame Leung

• Statement Verifier: Jeevan Jyot JeevanJyot Singh

• Editorialist: Aman Retired_cherry Dwivedi, Trung Đặng Kuroni Đoàn Đứ, Kanhaiya notsoloud1 Mohan

• Contest Admin: Anton antontrygubO_o Trygub, Yahor 244mhq Dubovik

• Head Admin: Alex Um_nik Danilyuk

The video editorials of the problems will be available on our YouTube channel as soon as the contest ends. Subscribe to get notifications about our new editorials.

Also, if you have some original and engaging problem ideas, and you’re interested in them being used in CodeChef's contests, you can share them here.

Hope to see you participating. Good Luck!

All our rated short contests, including Cook-Off, LunchTime, and Starters will now start at 20:00 HRS IST (+5:30 GMT) / 8:00 PM IST, on their usual days of the month. The contest durations are unchanged.

We have reached this conclusion after an extensive survey, and we hope the uniformity in the starting times help you plan your days easily.

PS: Long Challenge timings will remain as it is.

We invite you to participate in either CodeChef’s November Cook-Off or SnackDown Pre-Elimination, this Sunday, 21st November, rated for all. Cook-Off’s Div-1 and SnackDown Pre-Elimination will have the same problems.

Time: 9 PM — 12 AM IST

On the problem setting panel are:

• Setters: Utkarsh Utkarsh.25dec Gupta, Surya evilbuggy Prakash, Federico dario2994 Glaudo, Jeevan JeevanJyot Jyot Singh, Manuj Nanthan

• Testers: Anton antontrygubO_o Trygub, Yahor 244mhq Dubovik

• Statement Verifier: Anton antontrygubO_o Trygub, Yahor 244mhq Dubovik

• Contest Admins: Anton antontrygubO_o Trygub, Ashish Ashishgup Gupta

• Mandarin Translator: Qingchuan qingczha Zhang

• Russian Translator: Kostia lkosten Yarmash

• Vietnamese Translator: Team VNOI

Users who have qualified to participate in the SnackDown Pre-Elimination cannot participate in the Cook-Off. The Pre-Elimination will be rated for all users participating in it.

The Div-1 Cook-Off and Pre-Elimination ranklists will be merged to determine the winners of the cash/Amazon voucher prizes. Prizes for Cook-Off and Lunchtime Div-2 and Div-3 have been stopped from this month.

Plagiarism checks are being done on all the Snackdown rounds, and will be announced within a week, after which the Pre-Elimination ranklist will be finalized. Cheaters caught will be permanently banned from the platform.

The video editorials of the problems will be available on our YouTube channel as soon as the contest ends. Subscribe to get notifications about our new editorials.

Also, if you have some original and engaging problem ideas, and you’re interested in them being used in CodeChef's contests, you can share them here.

Hope to see you participating. Good Luck!

Hey all,

There is less than 7 hours left in the first round of Snackdown — go solve the one problem you need to qualify for the next round!

The panelists for the various rounds include Um_nik, antontrygubO_o, 244mhq, dario2994, DishonoredRighteous, Siberian, Ashishgup, nishant403, radoslav11, evilbuggy, Utkarsh.25dec, Aggu_01000101, srikkanthr, bhatnagar.mradul, 7dan, Dragonado, nandyboy.

Our translators are

• Russian Translator: lkosten

• Mandarin Translator: qingczha

• Vietnamese Translator: Team VNOI

All the participants advancing from the Qualifiers to further rounds of SnackDown 2021 will receive a digital Certificate of Participation from CodeChef.

Hope to see you on the scoreboard!

Hi There!

I am so glad to announce that after a brief gap, SnackDown, CodeChef's global annual programming contest, is back this year!

The pandemic created a big gap, but we are glad that we could make it happen now. The announcement went yesterday, and today I am messaging to invite your registrations for SnackDown 2021. Yes, the registrations are open and will end on October 19th.

There is one important change this year, w.r.t SnackDown — SnackDown 2021 will be an individual-participant contest and not a team competition.

Why this change? With the current restrictions of maintaining social distancing, we deemed it imprudent to conduct the contest in a team setup. While we feel that team collaboration makes SnackDown a unique event, we believe it’s safer not to risk the health and safety of our participants. We will revert to team-based competition in the next iteration of SnackDown.

A few important details, I want you to note:

Registrations are open now and will be closed on October 19th.

• The first Online Qualifier Round will be from Oct 15th till the 19th.
• Online Qualifier Round 1A will be held between 21st — 23rd October, and,
• Online Qualifier Round 1B will be held between 29th to 31st October.
• Online Pre-elimination will be on 21st November, and,
• Online Elimination will be on 5th December.
• The Online Finale is scheduled to be held on 9th January 2022.

Register Here

SnackDown 2021 champion gets to take home a hefty cash prize of $10000 and a Gold Trophy. The first and second runner-ups will be awarded $7500 and $5000 respectively and trophies of the respective rank. There are many more prizes and cash awards for many other ranks and categories as well.

• 4th to 25th Prize — $ 500
• Top Indian Performer — $ 2000
• Second Best Indian Performer — $ 1000
• 3rd to 10th rank Indians — $ 250
• Top School Student — $ 500
• Second Best School Student — $ 250
• Top Female Performer — $ 500
• Second Best Female Performer — $ 250
• Top School Student (Indian) — $ 250
• Top Female Performer (Indian) — $ 250

`* Atleast two problems must be solved to claim these prizes.

Apart from these prizes, you can also become the official CodeChef SnackDown Representative for your school/college/company, and earn rewards/merchandise. We have separate categories for our Global Reps and Indian Reps. Details are given on the Referral page of the website.

Apply to become a SnackDown Representative here

We have also created two Practice Contests for you — one with Beginner level problems and one with advanced level problems.

Practice Contest — Beginner

Practice Contest — Advanced

In addition, top CodeChef experts will take live sessions as part of a SnackDown 2021 preparatory series, on our YouTube channel.

To say that we’re elated to bring back SnackDown this year would be an understatement. We’re sure you share the emotion with us. No matter who you are, where you are, if you’re a coder at heart, you will code your heart out, this SnackDown.

Reminder: October has already started, which means SnackDown 2021 is going to be here soon. Register now if you haven't already: https://bit.ly/3FkNynr, the qualifiers will begin on October 15th.

CodeChef is hiring full time employees and interns for various positions. Please find details below.

Full Time Employees:

1. Contests and Learning Program Manager

• Own contests, set / test problems, and manage relevant team members
• Must have participated in at least 80 contests across CodeChef and Codeforces combined, and must have a CodeChef Overall max rating of at least 2200 (preferably >= 2400) or a Codeforces max rating of at least 2000 (preferably >= 2200).
• INR 25,00,000 — 35,00,000 per annum
• Detailed Job Description

2. Contests and Learning Associate

• Set / test problems, and related contest tasks
• Create new learning content
• Must have participated in at least 40 contests across CodeChef and Codeforces combined, and must have a CodeChef Overall max rating of at least 1800 (preferably >= 2000) or a Codeforces max rating of at least 1700 (preferably >= 1900).
• INR 8,00,000 — 15,00,000 per annum
• Detailed Job Description

3. Contests Program Associate

• Owning all operational and coordinational aspects of a contest
• Must have participated in at least 10 contests across CodeChef and Codeforces combined, and must have a CodeChef Overall max rating of at least 1300 (preferably >= 1500) or a Codeforces max rating of at least 1100 (preferably >= 1300).
• INR 4,00,000 — 7,00,000 per annum
• Detailed Job Description

Part Time Internships

1. Contests and Learning Intern

• Set / test problems, and related contest tasks
• Create new learning content
• Must have participated in at least 40 contests across CodeChef and Codeforces combined, and must have a CodeChef Overall max rating of at least 1800 (preferably >= 2000) or a Codeforces max rating of at least 1700 (preferably >= 1900).
• INR 15,000 to INR 25,000 per month
• Detailed Job Description

We invite you to participate in CodeChef’s February Starters, this Sunday, 28th February, from 5:15 PM — 8:15 PM IST. Note the updated time.

3 hours, 6 problems. Rated only for Div-3, but others can participate unofficially.

Also, if you have some original and engaging problem ideas, and you’re interested in them being used in CodeChef's contests, you can share them here.

Joining me on the problem setting panel are:

• Admin: Daanish Mahajan

• Setters: Daanish Mahajan, Smit l_returns Mandavia, Akash Whiplash99 Bhalotia

• Tester: Istvan iscsi Nagy

• Editorialist: Taranpreet taran_1407 Singh

• Statement Verifier: Jakub Xellos Safin

• Video Editorialists: Chirayu Chirayu Jain, Prachi agarwal19 Agarwal, Darshan darshancool25 Lokhande, Yashodhan ay21 Agnihotri, Bharat Singla, Shivam Bohra, Radoslav radoslav11 Dimitrov, Aryan Agarwala, Meet myth_gemphir Singh Gambhir

• Mandarin Translator: Qingchuan qingczha Zhang

• Russian Translator: Fedor Mediocrity Korobeinikov

• Hindi Translator: Akash devils_code Srivastava

• Bengali Translator: Mohammad solaimanope Solaiman

• Vietnamese Translator: Team VNOI

Prizes:

Top 10 Indian and top 10 Global school students from ranklist will receive certificates and CodeChef laddus, with which they can claim cool CodeChef goodies. Know more here.

The video editorials of the problems will be available on our YouTube channel as soon as the contest ends. Subscribe to get notifications about our new editorials.

Good luck and have fun!

We invite you to participate in CodeChef’s Div 3 Rated Contest, today, 24th February, from 9:30 PM — 12 AM IST.

2.5 hours, 6 problems.

Also, if you have some original and engaging problem ideas, and you’re interested in them being used in CodeChef's contests, you can share them here.

Joining me on the problem setting panel are:

• Admins & Setters: Daanish Mahajan, Smit l_returns Mandavia, Akash Whiplash99 Bhalotia

• Testers: Taranpreet taran_1407 Singh, Istvan iscsi Nagy

• Statement Verifier: Jakub Xellos Safin

• Editorialist: Taranpreet taran_1407 Singh

• Mandarin Translator: Qingchuan qingczha Zhang

• Russian Translator: Fedor Mediocrity Korobeinikov

• Hindi Translator: Akash devils_code Srivastava

• Bengali Translator: Mohammad solaimanope Solaiman

• Vietnamese Translator: Team VNOI

Good luck and have fun!

The CodeChef Dev team is on a mission. On a mission to make our platform stronger than ever before. In other words, when the competition gets heavy, we don’t want the platform crashing down. Now that the team has done all they could to make the platform as strong as Dwyane Johnson, we want you to come rumbling in the ring! Let’s see if the server can handle the heat when all members of the CC community come together to take part in the CodeChef Break-The-Server — An Unrated Contest With Div 3 Problems. If the server handles the footfall, well and good. If not, we get back to work. See you this Sunday, February 21, 9:30 PM.

Contest Date: February 21, Sunday

Contest Time: 9.30 PM to 10.30 PM IST

Check your timezone here

Compete Here

We invite you to participate in the CodeChef February Lunchtime — the 3-hour contest which offers 5 challenging problems to be solved. Make the most of this leap year and show off your programming skills along with increasing your CodeChef rating.

The problem statements of the contest will be available in English, Hindi, Bengali, Russian, Mandarin, and Vietnamese. Also, if you have some original and engaging problem ideas, and you’re interested in them being used in the CodeChef's contests, you can share them here.

I hope you will participate with your fellow programmers and enjoy the contest problems.

Contest Details:

Time: 29th February 2020 (1930 hrs) to 29th February 2020 (2230 hrs). (Indian Standard Time — +5:30 GMT) — Check your timezone.

• Contest link: www.codechef.com/LTIME81
• Registration: You just need to have a CodeChef handle to participate. For all those who are interested and do not have a CodeChef handle, are requested to register in order to participate.
• Prizes: Top 10 Indian and top 10 Global school students from ranklist will receive certificates and CodeChef laddus, with which the winners can claim cool CodeChef goodies. Know more here. Good Luck!
  Hope to see you participating!!
  Happy Programming!!