题解

#include "bits/stdc++.h"
using namespace std;

int main(){
    double n;
    cin>>n;
    int a[105];
    double b=0,c=0,d=0,e=0;
    for(int i = 1 ; i<=n ; i++){
        cin>>a[i];
        if(a[i]<=18){b++;}
        else if(a[i]<=35){c++;}
        else if(a[i]<=60){d++;}
        else if(a[i]>=61){e++;}
    }
    printf("%.2f",b/n*100);
    cout<<"%"<<endl;
    printf("%.2f",c/n*100);
    cout<<"%"<<endl;
    printf("%.2f",d/n*100);
    cout<<"%"<<endl;
    printf("%.2f",e/n*100);
    cout<<"%";
}