滁生

C. Foe Pairs Your task is to count the number of different intervals (x, y) (1 ≤ x ≤ y...

Alice and Bob are playing a game on a graph. They have an undirected graph without sel...

题目描述 幼儿园里有 n 个小朋友打算通过投票来决定睡不睡午觉。 对他们来说，这个问题并不是很重要，于是他们决定发扬谦让精神。 虽然每个人都有自己的主见，但是为了照顾一下自...

This is the easy version of the problem. The only difference is that in this version k...

adly, the problem setter couldn't think of an interesting story, thus he just asks you...

Time Limit: 2 sec / Memory Limit: 1024 MB Score : 500500 points Problem Statement You ...

You're given a multiset of non-negative integers {a1,a2,…,an}{�1,�2,…,��}. In one step...

A sequence is almost-increasing if it does not con...

这里有一条美丽的小巷，在一个购物中心的前面有树木。不幸的是，为了给停车场腾出空间，它不得不离开。 巷子里的树都长在一条线上。有n个树点，指数00是商场，指数n+1n+1是道...

output standard output You are given an array with n integers a**i and m queries. Each...

F. All Possible Digits time limit per test 3 seconds memory limit per test 256 megabyt...

You are given a tree consisting of $$$n$$$ vertices and $$$n - 1$$$ edges, and each ve...

题目 In this problem, unlike problem A, you need to look for unluckiest number, not the ...

题目 A subsequence of a is an array we can get by erasing some elements of a. It is allo...

题目 Consider the decimal presentation of an integer. Let's call a number d-magic if dig...

You are given array a with n integers and m queries. The i-th query is given with thre...

题目 Problem - F - Codeforces F. Xors on Segments You are given an array with n integers...

【Atcoder】AtCoder Grand Contest 059 B - Arrange Your Balls | 图论、构造 题目链接 B - Arrange You...

【Atcoder】AtCoder Regular Contest 144 E - GCD of Path Weights | 图论、构造 题目链接 E - GCD of P...

【JSCPC】2021江苏省赛 D. Pattern Lock | 构造 题目链接 Problem - D - Codeforces 题目 题目大意 $n$ 行 $m$ 列...