2277.cpp

这是哈尔滨工业大学acmOJ的源代码

/*  This Code is Submitted by wywcgs for Problem 2277 on 2006-06-11 at 19:16:40 */ 
#include <cstdio>

int main()
{
	int n, i, t, T;
	
	scanf("%d", &T);
	for(t = 0; t < T; t++) {
		scanf("%d", &n);
		int sum = 0, a;
		for(i = 0; i < n; i++) {
			scanf("%d", &a);
			sum += a;
		}
		printf("%s\n", sum%n ? "NO" : "YES");
	}
	
	return 0;
}