#include <bits/stdc++.h>

#define mp make_pair
#define pb push_back
#define f first
#define s second

using namespace std;

typedef long long ll;
const int INF = 1e9;
const ll INFl = 1e18;

typedef pair<int,int> pii;
typedef vector<int> vi;
typedef set<int> si;
typedef map<int,int> mii;
typedef unordered_map<int,int> umii;
typedef queue<int> qi;

vi V;

int main() {
	ios::sync_with_stdio(false); cin.tie(0);
	int n; cin >> n;
	if (n%10 == 7) cout << "Yes\n";
	else cout << "No\n";
	
		
	return 0;
}
