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

int main(){
	int N,a,b,c;
    cin >> N;
	a=N\100;
    b=N%100;
    c=b%100;
  if(a==7||b==7||c==7||){
  	cout << "Yes" <<endl;
  }else{
    cout << "No" <<endl;
  }
}