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

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

    if (N / 100 == 7) {
        cout << "Yes" << endl;
        return 0;
    }

    if (N % 100 / 10 == 7) {
        cout << "Yes" << endl;
        return 0;
    }

    if (N % 10 == 7) {
        cout << "Yes" << endl;
        return 0;
    }

    cout << "No" << endl;
}
