#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int N;
  cin >> N;
  int a,b,c;

  a = N / 100;
  b = (N - a * 100) / 10;
  c = (N - a * 100 - b * 10);

  if(a == 7 || b == 7 || c == 7){
  cout << "Yes" << endl;    
  }else{
    cout << "No" << endl;
  } 
  
}