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;
int main() {
  string A;
  cin >> A;
  if(A.at(0) == '7') {
    cout << "Yes" << endl;
  }
  else if(A.at(1) == '7') {
    cout << "Yes" << endl;
  }
  else if(A.at(2) == '7') {
    cout << "Yes" << endl;
  }
  else{
    cout << "No" << endl;
  }
}