#include <stdio.h>
int main(){
int n, a, b, t;
while(scanf("%d", &n) == 1){
a = b = 0;
while(n-- && scanf("%d", &t))
if(t & 1) ++b;
else ++a;
printf("%d\n", b & 1 ? b : a);
}
return 0;
}原文：http://blog.csdn.net/chang_mu/article/details/19626231