ZOJ Problem Set–1915 Above Average

Time Limit: 2 Seconds      Memory Limit: 65536 KB

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It is said that 90% of frosh expect to be above average in their class. You are to provide a reality check.

Input

The first line of standard input contains an integer C, the number of test cases. C data sets follow. Each data set begins with an integer, N, the number of people in the class (1 <= N <= 1000). N integers follow, separated by spaces or newlines, each giving the final grade (an integer between 0 and 100) of a student in the class.

Output

For each case you are to output a line giving the percentage of students whose grade is above average, rounded to 3 decimal places.

Sample Input
5
5 50 50 70 80 100
7 100 95 90 80 70 60 50
3 70 90 80
3 70 90 81
9 100 99 98 97 96 95 94 93 91

Sample Output
40.000%
57.143%
33.333%
66.667%
55.556%

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Source: University of Waterloo Local Contest 2002.09.28

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
  int cases;cin>>cases;
  while(cases--)
  {
    int N;cin>>N;
    int *p = new int[N];
    int n;
    int sumGrade = 0;
    for(int index = 0; index < N; index++)
    {
      cin>>n;
      *(p + index) = n;
      sumGrade += n;
    }
    double avgGrade = sumGrade*1.0/N;
    int above = 0;
    for(int index = 0; index < N; index++)
    {
      if(*(p + index) > avgGrade)
      {
        above++;
      }
    }
    cout<<fixed<<setprecision(3)<<above*100.0/N<<"%"<<endl;
  }
}