#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define ld long double
#define fi first
#define se second
#define endl '\n'
#define fn(i,x) for(i=0;i<x;i++)
#define fit(it,s) for(it=s.begin();it!=s.end();it++)
#define vii vector<int>
#define vll vector<ll>
#define mx 1e18
#define mod 1000000007
#define pii pair<int,int>
#define pll pair<ll,ll>
#define mii map<int,int>
#define mll map<ll,ll>
#define sii set<int>
#define sll set<ll>
#define io ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
int main()
{io
int n;cin>>n;
while(n)
{
	if(n%10==7)
	{
		cout<<"Yes";return 0;
	}n=n/10;
}
cout<<"No";return 0;


	


 
}
