#include<iostream>
#include<unordered_map>
#include<algorithm>
#include<vector>
#include<string>
#include<string.h>
#include<unordered_set>
#include<set>
#include<map>
#include<queue>
#include<iomanip>
#include<tgmath.h>
#include<stdlib.h>
#include<assert.h>
#include<stdio.h>



#define ll long long


/*
_
_._ _..._ . - ',     _.._(`))
'-. `     ' / -._. - '    ', /
)         \            '.
/ _    _ | \
| a    a    /              |
\   . - .;
'-('' ).-', '       ;
'-;           |      .'
\           \    /
| 7.__  _. - \   \
| |  |  ``/ / `  /
/, _|  |   /, _/   /
/, _ / '`-'
*/
using namespace std;


int main()
{
    int n;
    cin >> n;
    while (n != 0) {
        int dig = n % 10;
        if (dig == 7) {
            cout << "Yes";
            return 0;
        }
        n /= 10;
    }
    cout << "No";
}

