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 <stdio.h>

int main(void) {
  int N, o, t, s;
  scanf("%d", &N);
  for (int i=0;i<4; i++){
    o = N%10;
    t = N/10%10;
    s = N/100%10;
  }
  if (o == 7 || t == 7 || s == 7)
    printf("Yes");
  else
    printf("No");
  return 0;
}