#include <iostream> #include <cstdio> using namespace std ; int main() { int c ; cin >> c ; while(c--) { int n ; cin >> n ; int d[n] ; double sum = 0.0 ; for ( int i = 0 ; i < n ; ++i) cin >> d[i] ; for ( int i= 0 ;i < n ;++i) sum += d[i] ; double avg = sum / n ; int cnt = 0 ; for ( int i = 0 ; i< n ;++i) if (d[i] > avg) ++cnt ; printf("%.3lf%%\n", cnt *100.0/n) ; } return 0 ; }
简单题