#include<iostream>

using namespace std;

int main()
{
    ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    int n;
    cin >> n;
    if (n/100==7)
    {
        cout << "Yes";
        return 0;
    }
    n%=100;
    if (n/10==7||n%10==7)
    {
        cout << "Yes";
        return 0;
    }
    cout << "No";
}