#include<iostream>
using namespace std;

int main()
{
    int score;
    cout << "Enter Score: ";
    cin >> score;
    cout <<" Grade = ";
    if (score >= 90 )
      cout <<'A';
    else if (score >= 80 )
      cout <<'B';
    else if (score >= 70 )
      cout <<'C';
    else if (score >= 60 )
      cout <<'D';
    else
      cout <<'F';
    
    cout <<endl;
   
    system("pause");
    return 0;
}