C. Vasya and Petya's Game Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/577/problem/C Description Vasya and Petya are playing a simple game. Vasya thought of number x between 1 and n, and Petya tries to guess the number. P…
C. Vasya and Petya's Game time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Vasya and Petya are playing a simple game. Vasya thought of number x between 1 and n, and Petya tries to guess the…
Vasya and Petya's Game Problem's Link Mean: 给定一个n,系统随机选定了一个数x,(1<=x<=n). 你可以询问系统x是否能被y整除,系统会回答"Yes"or“No". 问:至少询问多少次可以唯一确定x,并输出询问序列.(special judge). analyse: 做法:求质数的整数次幂(不大于n). 思路:首先我们肯定是用质数来判断,因为质数排除的是最多的. 如果质数p[i]能够整除,那么x有可能是p[i]^2,…
水 A - Multiplication Table 不要想复杂,第一题就是纯暴力 代码: #include <cstdio> #include <algorithm> #include <cstring> #include <cmath> using namespace std; const int N = 1e5 + 10; const int INF = 0x3f3f3f3f; int main(void) { int n, x; scanf (&qu…
A. Vasya the Hipster Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/581/problem/A Description One day Vasya the Hipster decided to count how many socks he had. It turned out that he had a red socks and b blue socks. Accordi…