#include <iostream>
#include <string>
#include <cmath>
#include <algorithm>
#include <vector>
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)/1==7){
        cout<<"Yes"<<endl;
    }else{
        cout<<"No"<<endl;
    }


    return 0;

}

