#include <bits/stdc++.h>
using namespace std;
 
int main() {
int x,a,b,c;
cin >> x;
 a=x/100;
 b=(x-100*a)/10;
 c=x-(100*a)-(10*b);
 if(a==7 || b==7 || c==7){
 cout <<"Yes"<<endl;
 }else{
 cout <<"No"<<endl;
 }
}
