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Codeforces Round #270 A. Design Tutorial: Learn from Math【数论/埃氏筛法】

time limit per test 1 second memory limit per test 256 megabytes input standard input o...

2017-12-02

0 471

Codeforces Round #306 (Div. 2) A. Two Substrings【字符串/判断所给的字符串中是否包含不重叠的“BA” “AB”两个字符串】

A. Two Substrings time limit per test 2 seconds memory limit per test 256 megabytes input standard input ...

2017-12-02

0 428

Codeforces Round #267 (Div. 2) B. Fedor and New Game【位运算/给你m+1个数让你判断所给数的二进制形式与第m+1个数不相同的位数是不是小于等于k，是的话就累计起来】

After you had helped George and Alex to move in the dorm, they went to help their friend Fedor play a new computer game «Call of Soldiers 3». The...

2017-12-02

0 369

Codeforces Round #369 (Div. 2) A. Bus to Udayland【字符串/二维字符数组求连起来的座位并改为其他字符】

A. Bus to Udayland time limit per test 2 seconds memory limit per test 256 megabytes input standard input...

2017-12-02

0 464

Codeforces Round #289 (Div. 2, ACM ICPC Rules) A. Maximum in Table【递推】

A. Maximum in Table time limit per test 2 seconds memory limit per test ...

2017-12-01

0 467

Codeforces Round #191 (Div. 2) A. Flipping Game【*枚举/DP/每次操作可将区间[i,j](1=<i<=j<=n)内牌的状态翻转（即0变1,1变0），求一次翻转操作后，1的个数尽量多】

A. Flipping Game time limit per test 1 second ...

2017-12-01

0 744

Codeforces Round #377 (Div. 2) A. Buy a Shovel【暴力/口袋里面有无限枚 10 元和一枚 r 面值的硬币，问最少可以买多少把价值为 k 的铁铲】

A. Buy a Shovel time limit per test 1 second memory limit per test 256 megabytes input standard input ...

2017-12-01

0 404

Good Bye 2016 A. New Year and Hurry【贪心/做题目每道题花费时间按步长为5等差增长，求剩余时间够做几道题】

A. New Year and Hurry time limit per test 1 second memory limit per test 256 megabytes input standard inp...

2017-12-01

0 372

Codeforces Round #109 (Div. 2) A. I_love_%username%【打擂台算法/满足当前数字在已经出现的数字的最大值和最小值之间的个数】

A. I_love_%username% time limit per test 2 seconds memory limit per test 256 meg...

2017-12-01

0 399

Codeforces Beta Round #25 (Div. 2 Only) A. IQ test【双标记/求给定数中唯一的奇数或偶数】

A. IQ test time limit per test 2 seconds memory limit per test 256 megabytes input standard input ...

2017-12-01

0 370