Untitled

#include <iostream>
#include <cmath>
using namespace std;



void PrinTF(int &x,int &grade) {
    if (90 <= x) {
        grade = 4;
    }
    else if (80 <= x && 90 > x) {
        grade = 3;
    }
    else if (70 <= x && 80 > x) {
        grade = 2;
    }
    else if (60 <= x && 70 > x) {
        grade = 1;
    }
    else {
        grade = 0;
    }

}

int main() {
    int grade = 5;
    int x;
    cin >> x;
    PrinTF(x, grade);
    cout << grade;
    return 0;
}