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摘要： Codeforces Round #575 (Div. 3) D2 - RGB Substring (hard version) The only difference between easy and hard versions is the size of the input. You are 阅读全文

摘要： Codeforces Round #575 (Div. 3) D1 - RGB Substring (easy version) The only difference between easy and hard versions is the size of the input. You are 阅读全文

摘要： Codeforces Round #575 (Div. 3) C - Robot Breakout n robots have escaped from your laboratory! You have to find them as soon as possible, because these 阅读全文

摘要： Codeforces Round #575 (Div. 3) B - Odd Sum Segments You are given an array a consisting of n integers a1,a2,…,an. You want to split it into exactly k  阅读全文

摘要： Codeforces Round #575 (Div. 3) A - Three Piles of Candies Alice and Bob have received three big piles of candies as a gift. Now they want to divide th 阅读全文

摘要： Educational Codeforces Round 69 (Rated for Div. 2) C - Array Splitting You are given a sorted array a1,a2,…,an (for each index i>1 condition ai≥ai−1 h 阅读全文

摘要： Educational Codeforces Round 69 (Rated for Div. 2) B - Pillars There are n pillars aligned in a row and numbered from 1 to n. Initially each pillar co 阅读全文

摘要： Educational Codeforces Round 69 (Rated for Div. 2) A - DIY Wooden Ladder Let's denote a k-step ladder as the following structure: exactly k+2 wooden p 阅读全文

摘要： Codeforces Round #573 (Div. 2) C - Tokitsukaze and Discard Items Recently, Tokitsukaze found an interesting game. Tokitsukaze had n items at the begin 阅读全文

摘要： Codeforces Round #573 (Div. 2) B - Tokitsukaze and Mahjong Tokitsukaze is playing a game derivated from Japanese mahjong. In this game, she has three 阅读全文