#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (n); ++i)
using namespace std;
using ll = long long;

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 % 10 == 7) cout << "Yes" << endl;
    else cout << "No" << endl;
}