2350.cpp

这些是我到目前在PKU上做出的题目

#include <iostream.h>
#include <stdio.h>
int main()
{int a[1001],c,n,i,j,ok;
 double adv,pen;
 cin>>c;
 for (i=1;i<=c;i++)
 {cin>>n;adv=0;ok=0;
  for (j=1;j<=n;j++)
  {cin>>a[j];
   adv=adv+a[j];}
  adv=adv/n;
  for (j=1;j<=n;j++)
   if (a[j]>adv) ok++;
  pen=double(100)/n*ok;
  printf("%.3f%%\n",pen);}
return 0;
}