poj3219
c(n,k)(k<=n)的奇偶性取决于(n-k)与k的二进制表达式是否存在同一位上的两个数码均为1,若存在,则为偶数,反之为奇数
View Code
#include <cstdio>
#include <iostream>
#include <cstdlib>
#include <cstring>
#include <cmath>
using namespace std;
int main()
{
//freopen("D:\\t.txt", "r", stdin);
int n, k;
while (scanf("%d%d", &n, &k) != EOF)
printf("%d\n", k&(n-k)?0:1);
return 0;
}