#include <bits/stdc++.h>
#define endl '\n'
#define ll long long
#define double long double
using namespace std;

ll n;

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n;
    if (n % 10 == 7 || (n / 10 % 10 == 7) || n / 100 == 7)
        cout << "Yes";
    else
        cout << "No";
    return 0;
}
