#include <bits/stdc++.h>
#include <random>

#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4")

#define ll long long
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define o cout<<"BUG"<<endl;
#define	IOS ios_base::sync_with_stdio(0);
#define en "\n"
#define FOR(i, j, n) for(int j = i; j < n; ++j)
#define forn(i, j, n) for(int j = i; j <= n; ++j)
#define nfor(i, j, n) for(int j = n; j >= i; --j)
#define sortv(vv) sort(vv.begin(), vv.end())
#define all(v) v.begin(), v.end()
#define ld long double
#define ull unsigned long long
#define pii pair <int, int>


using namespace std;
const ll maxn=1e6+100,inf=1e18,LOG=23,mod=1e9+7;
int block = 300, timer = 0;
const ld EPS = 1e-7;

#define bt(i) (1 << (i))
#define int ll

main()
{
	int n;
	cin >> n;
	if(n % 10 == 7)
	{
		cout << "Yes";
		return 0;
	}
	if(n / 10 % 10 == 7)
	{
		cout << "Yes";
		return 0;
	}
	if(n / 100 == 7)
	{
		cout << "Yes";
		return 0;
	}
}