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

#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep1(i, n) for (int i = 1; i < (int)(n); i++)
typedef long long ll;

int main() {
    int n; cin >> n;
    if(n % 10 == 7){
        cout << "Yes" << endl;
    }else if(n / 100 == 7){
        cout << "Yes" << endl;
    }else if((n % 100) / 10 == 7){
        cout << "Yes" << endl;
    }else{
        cout << "No" << endl;
    }
}