#include<bits/stdc++.h>
using namespace std;
int main(){
	int n;
	cin>>n;
	if(n%10==7||n/10%10==7||n/100==7)
	{
		cout<<"Yes"<<endl;
		return 0;
	 } 
	 else
	 {
	 	cout<<"No"<<endl;
	 }
	 return 0;
} 