Codeforces 1080C - Masha and two friends - 容斥题解链接https://lucien.ink题目链接https://codeforces.com/contest/1080/problem/C题目Recently, Masha was presented with a chessboard with a height of $n$ and a widt...
Codeforces 1088E - Ehab and a component choosing problem题解链接https://lucien.ink题目链接https://codeforces.com/contest/1088/problem/E题目You're given a tree consisting of $n$ nodes. Every node $u$ has a we...
Codeforces 1088D - Ehab and another another xor problem题解链接https://lucien.ink题目链接https://codeforces.com/contest/1088/problem/D题目This is an interactive problem!Ehab plays a game with Laggy. Ehab has...
Codeforces 1088C - Ehab and a 2-operation task题解链接https://lucien.ink题目链接https://codeforces.com/contest/1088/problem/C题目You're given an array $a$ of length $n$. You can perform the following operati...
Codeforces 1082D - Maximum Diameter Graph - 贪心题解链接https://lucien.ink题目链接https://codeforces.com/contest/1082/problem/D题目Graph constructive problems are back! This time the graph you are asked to bui...