题意:给定 n 个密码,你要按长度不递减的顺序进行尝试,问你最多和最少试多少次可能找出密码,每尝试 k 次错误的,就要等5秒. 析:我们只要把长度全都统计下来,然后从1开始去找目标长度,最少的就是正好到目标长度,最多的就是把目标长度恰好试完. 代码如下: #pragma comment(linker, "/STACK:1024000000,1024000000") #include <cstdio> #include <string> #include <…

题目链接: B. Passwords time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Vanya is managed to enter his favourite site Codehorses. Vanya uses n distinct passwords for sites at all, however he can…

time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output Vanya is managed to enter his favourite site Codehorses. Vanya uses n distinct passwords for sites at all, however he can't remember which one e…

B. Passwords time limit per test:2 seconds memory limit per test:256 megabytes input:standard input output:standard output Vanya is managed to enter his favourite site Codehorses. Vanya uses n distinct passwords for sites at all, however he can't rem…

题意:给定一个有向图,你从1出发到n,走尽可能多的点,并且使总权值不大于t. 析:在比赛时,竟然看成有向图了,就想了好久,感觉dp,但是不会啊...如果是有向图就好做多了,枚举边,然后打印就好,dp[i][j] 表示, 经过 i 个结点,并且在 j的最小时间. 代码如下: #pragma comment(linker, "/STACK:1024000000,1024000000") #include <cstdio> #include <string> #inc…

B. Passwords 题目连接: http://codeforces.com/contest/721/problem/B Description Vanya is managed to enter his favourite site Codehorses. Vanya uses n distinct passwords for sites at all, however he can't remember which one exactly he specified during Code…

题目链接:http://codeforces.com/contest/721/problem/B B. Passwords time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Vanya is managed to enter his favourite site Codehorses. Vanya uses n distinct…

D. Secret Passwords One unknown hacker wants to get the admin's password of AtForces testing system, to get problems from the next contest. To achieve that, he sneaked into the administrator's office and stole a piece of paper with a list of n passwo…

链接: https://codeforces.com/contest/1263/problem/D 题意: One unknown hacker wants to get the admin's password of AtForces testing system, to get problems from the next contest. To achieve that, he sneaked into the administrator's office and stole a piec…

原题: B. Passwords time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Vanya is managed to enter his favourite site Codehorses. Vanya uses n distinct passwords for sites at all, however he can't…