#include<iostream>
#include<string>
#include<algorithm>
#include<vector>
using namespace std;

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

    }