Can you give me links of some good blogs not of blogs containing tutorial on data structure and algorithm but some technique which is frequently used in codeforces question.

why haven't the rating change for Edu Round 180 happened or is it just became a non rated round?

can anyone tell me

Today, I sat down in afternoon(2:00PM) to attend the contest and thinking that i will solve A and B and get a positive delta but,contest author had something other ideas in their mind, i solved A and then i move to B that ok i have plenty of time i can get AC on B.But when i read B i was just frozen not because that question was hard but because i didn,t even understand the question and it's meaning.I know my english is not that bad but after reading the question i am thinking about taking an english class near my house..i am just exhausted, first cheating is increased in codeforces due to AI and now this..

wish me good luck for the next contest..

i get -78 delta...

2059B - Стоимость массива can anyone help me with k<n case ... i don't know how to approach .it.

can anyone also tell me how can i approach div 2 B problem as i am unable to do it..