#include <bits/stdc++.h>
#define F first
#define S second
#define pb push_back
#define mp make_pair
#define rep(i,a,b) for(int i=a; i<b; i++)
#define dep(i,a,b) for(int i=a; i>=b; i--)
#define sq(a) (a)*(a)
#define ms(a,v)	memset(a,v,sizeof a)
using namespace std;
const long long INF = 1e18 , MAXN =1e5, MOD = 1e9 + 7;
typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<string> vs;
typedef vector<vector<int> > vvi;
typedef map<int, int> mii;
typedef map<string, int> msi;
typedef map<int, string> mis;
typedef map<string, string> mss;

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