#include <fstream>
#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <queue>
#include <set>
#include <cmath>
#include <climits>
#include <map>
#include <unordered_map>
#include <set>
#include <unordered_set>

#define rep(i,n) for (int i = 0; i < (n); ++i)
#define sz(x) int(x.size())

using namespace std;
typedef long long ll;

int main() {
#ifdef RUN_LOCAL
  ifstream in("../input.txt");
  cin.rdbuf(in.rdbuf());
#endif

  cin.tie(0);
  ios::sync_with_stdio(false);

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

  return 0;
}
