20-AtCoder Quiz 2.cpp

/*
 * 20-AtCoder Quiz 2
 * Link: https://vjudge.net/problem/AtCoder-abc219_a
 */
#include <iostream>
using namespace std;

int main ()
{
    int x;

    cin>>x;

    if (x>= 90)
        cout << "expert";
    else if (x>=70 && x<90)
        cout << 90 - x;
    else if (x>=40 && x<70)
        cout << 70 -x;
    else if (x>=0 && x<40)
        cout << 40 -x;

    return 0;
}