#include <bits/stdc++.h>
using namespace std;

int main() {
    int N;
    cin >> N;

    if (N/100 == 7) {
        cout << "Yes" << endl;
    } else if ((N%100)/10 == 7) {
        cout << "Yes" << endl;
    } else if (((N%100)%10) == 7) {
        cout << "Yes" << endl; 
    } else {
        cout << "No" << endl;
    }
}