#include <iostream>
#include <fstream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <limits>
#include <queue>
#include <iomanip>

using namespace std;
using ll = long long int;
typedef vector<ll> vll;
typedef vector<vll> vvll;
typedef vector<vvll> vvvll;
const int MOD=1000000007;
//const int MOD=998244353;
const int INTMAX=1001001000;
const ll LLMAX=1010010010010010000;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    
    ll N;
    cin>>N;
    if(N%10==7 || (N%100)/10==7 || N/100==7) cout<<"Yes"<<endl;
    else cout<<"No"<<endl;
    
    return 0;
}
