摘要：原文链接：https://www.cnblogs.com/xwl3109377858/p/12124554.html Good Bye 2019 C. Make Good Let's call an array a1,a2,…,am of nonnegative integer numbers go 阅读全文

摘要：原文链接：https://www.cnblogs.com/xwl3109377858/p/11797618.html Codeforces Round #598 (Div. 3) D - Binary String Minimizing You are given a binary string o 阅读全文

摘要：原文链接：https://www.cnblogs.com/xwl3109377858/p/11564279.html Codeforces Round #587 (Div. 3) C - White Sheet There is a white sheet of paper lying on a r 阅读全文

摘要：原文链接：https://www.cnblogs.com/xwl3109377858/p/11564317.html Codeforces Round #587 (Div. 3) D - Swords There were n types of swords in the theater basem 阅读全文

摘要：原文链接：https://www.cnblogs.com/xwl3109377858/p/11564214.html Codeforces Round #587 (Div. 3) B - Shooting Recently Vasya decided to improve his pistol sh 阅读全文

摘要：原文链接：https://www.cnblogs.com/xwl3109377858/p/11564167.html Codeforces Round #587 (Div. 3) A - Prefixes Nikolay got a string s of even length n, which 阅读全文

摘要：原文链接：https://www.cnblogs.com/xwl3109377858/p/11405773.html Educational Codeforces Round 71 (Rated for Div. 2) D - Number Of Permutations You are given 阅读全文

摘要：原文链接：https://www.cnblogs.com/xwl3109377858/p/11404321.html Educational Codeforces Round 71 (Rated for Div. 2) C - Gas Pipeline You are responsible for 阅读全文

摘要：原文链接：https://www.cnblogs.com/xwl3109377858/p/11404261.html Educational Codeforces Round 71 (Rated for Div. 2) B - Square Filling You are given two mat 阅读全文

摘要：原文链接：https://www.cnblogs.com/xwl3109377858/p/11404050.html Educational Codeforces Round 71 (Rated for Div. 2) A - There Are Two Types Of Burgers There 阅读全文

摘要：Codeforces Round #577 (Div. 2) 原文链接：https://www.cnblogs.com/xwl3109377858/p/11306077.html C - Maximum Median You are given an array a of n integers, w 阅读全文

摘要：Codeforces Round #577 (Div. 2) B - Zero Array You are given an array a1,a2,…,an. In one operation you can choose two elements ai and aj (i≠j) and decr 阅读全文

摘要：Codeforces Round #577 (Div. 2) A - Important Exam A class of students wrote a multiple-choice test. There are n students in the class. The test had m  阅读全文

摘要：Codeforces Round #576 (Div. 2) D - Welfare State There is a country with n citizens. The i-th of them initially has ai money. The government strictly 阅读全文

摘要：Codeforces Round #576 (Div. 2) C - MP3 One common way of digitalizing sound is to record sound intensity at particular time moments. For each time mom 阅读全文

摘要：Codeforces Round #576 (Div. 2) B - Water Lily While sailing on a boat, Inessa noticed a beautiful water lily flower above the lake's surface. She came 阅读全文

摘要：Codeforces Round #576 (Div. 2) A - City Day For years, the Day of city N was held in the most rainy day of summer. New mayor decided to break this tra 阅读全文

摘要：Codeforces Round #575 (Div. 3) F - K-th Path You are given a connected undirected weighted graph consisting of n vertices and m edges. You need to pri 阅读全文

摘要：Codeforces Round #575 (Div. 3) E - Connected Component on a Chessboard You are given two integers b and w. You have a chessboard of size 109×109 with 阅读全文

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