参考答案：

#include<iostream>

using namespace std;

int main() 
{
    int a, b, c;

    cin >> a >> b >> c;

    double x = (a + b + c) / 3.0;
    if (x >= 60) cout << "No" << endl;
    else cout << "Yes" << endl;

    return 0;
}

Python:

a, b, c = map(int, input().split())
sav_score = (a + b + c)/3
if sav_score >=60:
    print('No')
else:
    print('Yes')