同一份代码获得随机评测结果？

#include<cstdio>
#include<algorithm>
int cmp(int x,int y){return x<=y;}
int main(){
  int n,mn[51];
  long long ans=1;
  scanf("%d",&n);
  for(int i=0;i<n;i++){
    scanf("%d",&mn[i]);
  }
  std::sort(mn,mn+n,cmp);
  for(int i=0;i<n;i++){
    ans*=(long long)(mn[i]-i);
    ans%=(long long)1000000007;
  }
  printf(ans<0?"0\n":"%lld\n",ans);
  return 0;
}