#include <bits/stdc++.h>
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;
  }
}