文件目录

#include <iostream>
using namespace std;
int main()
{
    int n;
    cin >> n;
    int age;
    int a[4] = {};
    for (int i = 0; i < n; i++)
    {
        cin >> age;
        if (age < 19)
            a[0]++;
        else if (age < 36)
            a[1]++;
        else if (age < 61)
            a[2]++;
        else
            a[3]++;
    }
    double f[4] = {100.0 * a[0] / n, 100.0 * a[1] / n, 100.0 * a[2] / n, 100.0 * a[3] / n};
    for (int i = 0; i < 4; i++)
        printf("%.2lf%%\n", f[i]);
    return 0;
}