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>
#define endl '\n'

using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int N = 0;
    cin>>N;
    while(N > 1){
        int re = N % 10;
        if(re == 7){
            cout<<"Yes"<<endl;
            return 0;
        }
        N = N / 10;
    }
    cout<<"No"<<endl;
    return 0;
}