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


int main(){
    int N;
    cin>>N;
    if(N/100==7){
        cout<<"Yes"<<endl;
    }
    else if ((N%100)/10==7){
        cout<<"Yes"<<endl;
    }
    else if (N%10==7){
        cout<<"Yes"<<endl;
    }
    else{
        cout<<"No"<<endl;
    }
    
    
}
