Problem:
Score : 100 points

Problem Statement

Given is a three-digit integer N. Does N contain the digit 7?

If so, print Yes; otherwise, print No.

Constraints

100 \leq N \leq 999

Input

Input is given from Standard Input in the following format:

N

Output

If N contains the digit 7, print Yes; otherwise, print No.

Sample Input 1

117

Sample Output 1

Yes

117 contains 7 as its last digit.

Sample Input 2

123

Sample Output 2

No

123 does not contain the digit 7.

Sample Input 3

777

Sample Output 3

Yes

Solution in C++ (GCC 9.2.1) (judge verdict: Accepted)

#include <bits/stdc++.h>
using namespace std;

struct edge { int to, cost; };
typedef pair<int, int> P;
typedef pair<string, int> SP;
#define rep(i, n) for(int i = 0; i < n; ++i)

const int INF = 1e9 + 7;
using ll = long long;
using vi = vector<int>;
using vvi = vector<vi>;
using vvvi = vector<vvi>;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    // vvvi V (50, vvi(50, vi(2500)));

    string s;
    cin >> s;
    rep(i, s.length()){
        if(s[i] == '7'){
            cout << "Yes" << endl;
            return 0;
        }
    }
    cout << "No" << endl;

    return 0;
}