先放大再缩小

#include <iostream>
using namespace std;
int n;
int num;
int cnt1,cnt2;
int check(int x)
{
    int temp = x / 10;
    x %= 10;
    if(x >= 5)
    {
        temp++;
    }
    return temp;
}
int main()
{
    cin >> n;
    for(int i = 1;i <= n;i++)
    {
        cin >> num;
        if(num >= 60 && num <= 100)
        {
            cnt1++;
        }
        if(num >= 85 && num <= 100)
        {
            cnt2++;
        }
    }
    cnt1 = cnt1*1000/n;
    cnt2 = cnt2*1000/n;

    cout << check(cnt1) << "%" << endl;
    cout << check(cnt2) << "%" << endl;
    return 0;
}