#include <iostream>
#include <cstring>
#include <cmath>
#include <vector>
#include <algorithm>
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <set>
#include <map>
#include <iterator>

using namespace std;

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