#include "bits/stdc++.h"
using namespace std;
#define MOD 1000000007
//#define MOD 998244353
const double EPS = 1e-9;
#define INF (1LL<<60)
#define D double
#define fs first
#define sc second
#define int long long
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define RFOR(i,a,b) for(int i = (b-1);i>=(a);--i)
#define REP(i,n)  FOR(i,0,(n))
#define RREP(i,n) RFOR(i,0,(n))
#define ITR(itr,mp) for(auto itr = (mp).begin(); itr != (mp).end(); ++itr)
#define RITR(itr,mp) for(auto itr = (mp).rbegin(); itr != (mp).rend(); ++itr)
#define range(i,a,b) ((a)<=(i) && (i)<(b))
#define debug(x)  cout << #x << " = " << (x) << endl;
#define SP << " " << 
typedef pair<int,int> P;
typedef vector<int> vec;
typedef vector<vector<int>> mat;

signed main(){
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.precision(20);

  int n;
  cin >> n;

  ostringstream oss;
  oss << n;
  string s = oss.str();

  REP(i,s.length()){
    if(s[i] == '7'){
      cout << "Yes" << endl;
      return 0;
    }
  }

  cout << "No" << endl;

  return 0;
}
