#include<bits/stdc++.h>

using namespace std;
#define int int64_t
#define rep(i,a,n) for(int i=(a); i<(n); ++i)
#define reps(i,a,n) for(int i=(a); i<(n); --i)
#define all(x) (x).begin(),(x).end()
#define gsort(x, n) sort((x), (x + n) greater<int>())
#define rv(s) reverse((s).begin(), (s).end())
#define setout(n, x) setw(n) << setfill(x)
#define Fixed(n) fixed << setprecision(n)
#define pb(x, a) (x).push_back(a)
#define fb(x, a) (x).flont_back(a)
#define eb(x, a) (x).emplaes_back(a)
using pii = pair<int, int>;
constexpr int INF = 0x3f3f3f3f;
constexpr long long LINF = 0x3f3f3f3f3f3f3f3fLL;
const long long mod = 1e9 + 7;

signed main()
{
	cin.tie(nullptr);
    ios_base::sync_with_stdio(false);
    int n;
    cin>>n;

    while(n > 0){
        if(n % 10 == 7){
            cout<<"Yes\n";
            return 0;
        }
        n /= 10;
    }

    cout<<"No\n";
    return 0;
}