摘要：链接：https://www.nowcoder.com/acm/contest/156/C来源：牛客网 托米完成了1317的上一个任务，十分高兴，可是考验还没有结束 说话间1317给了托米 n 个自然数 a1... an, 托米可以选出一些带回家，但是他选出的数需要满足一些条件 设托米选出来了k 个 阅读全文

摘要：链接：https://www.nowcoder.com/acm/contest/140/G White Cloud placed n containers in sequence on a axes. The i-th container is located at x[i] and there a 阅读全文

摘要：链接：https://www.nowcoder.com/acm/contest/141/H来源：牛客网 Eddy has solved lots of problem involving calculating the number of coprime pairs within some rang 阅读全文

摘要：题目链接：http://codeforces.com/contest/1004/problem/B B. Sonya and Exhibition time limit per test 1 second memory limit per test 256 megabytes input stand 阅读全文

摘要：Problem Description OO has got a array A of size n ,defined a function f(l,r) represent the number of i (l<=i<=r) , that there's no j(l<=j<=r,j<>i) sa 阅读全文

摘要：E1. Median on Segments (Permutations Edition) time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard o 阅读全文

摘要：Little Nastya has a hobby, she likes to remove some letters from word, to obtain another word. But it turns out to be pretty hard for her, because she 阅读全文

摘要：C. Three displays time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output It is the middle of 201 阅读全文