spoj 2148

看似很水  却wa了好多遍   spoj上果然没有一下可以水过去的题.......

#include<cstdio>#include<cstring>#include<algorithm>#include<vector>using namespace std;int main(){    int t;    scanf("%d",&t);    while(t--)    {        long long n,a;        long long sum = 0;        scanf("%lld",&n);        for(long long i = 0; i < n; i++)        {            scanf("%lld",&a);            sum += a;            long long g = sum/n;            sum -= n*g;        }        if(sum % n == 0)            puts("YES");        else            puts("NO");    }    return 0;}