知识点:

分支控制:分支控制

#include <iostream>
using namespace std;

int main() {
    int math, language, english;
    float average;

    cin >> math >> language >> english;

    average = (math + language + english) / 3.0;

    if (average < 60) {
        cout << "YES";
    } else {
        cout << "NO";
    }

    return 0;
}