数学 之 hdu 4861

//  [7/23/2014 Sjm]/*对于此题，举出数据找规律，即可AC。。。不过悲催的WA了好多次，后来发现竟把"YES"打印成"Yes"了。。。。 注释掉的代码是用来找规律的。。。*/

#include <iostream>#include <cstdlib>#include <cstdio>using namespace std;int k, p;/*int myget(int x, int y){int sum = 1;for (int i = 0; i < y; ++i) {sum *= x;}return sum;}void Panduan(int p){for (int k = 1; k <= 10; ++k) {int sum = 0;for (int i = 1; i < p; ++i) {sum += myget(i, k);}printf("%d ", sum%p);}}*/int main(){/*while (cin >> p) {Panduan(p);cout << endl;}*///freopen("input.txt", "r", stdin);//freopen("output.txt", "w", stdout);while (~scanf("%d %d", &k, &p)) {int tep = k / (p - 1);if (0 == tep % 2) {printf("NO\n");}else {printf("YES\n");}}return 0;}