Couple doubi
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 1087 Accepted Submission(s): 762
Problem Description DouBiXp has a girlfriend named DouBiNan.One day they felt very boring and decided to play some games. The rule of this game is as following. There are k balls on the desk. Every ball has a value and the value of ith (i=1,2,...,k) ball is 1^i+2^i+...+(p-1)^i (mod p). Number p is a prime number that is chosen by DouBiXp and his girlfriend. And then they take balls in turn and DouBiNan first. After all the balls are token, they compare the sum of values with the other ,and the person who get larger sum will win the game. You should print “YES” if DouBiNan will win the game. Otherwise you should print “NO”.
Input Multiply Test Cases.
In the first line there are two Integers k and p(1<k,p<2^31).
Output For each line, output an integer, as described above.
Sample Input 2 3 20 3
Sample Output YES NO
Author FZU
Source 2014 Multi-University Training Contest 1 数论： 费马引理 官方解题报告：
代码：
#include<stdio.h>
void main(){
int k,p;
while(~scanf("%d%d",&k,&p))
k/=(p-1),puts(k&1)?"YES":"NO");
}
编程是一种快乐，享受代码带给我的乐趣！！！
