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>
#include <string.h>
#include <stdlib.h>
#include <math.h>

int main(void)
{
  int n, n3, n2, n1;
  scanf("%d", &n);
  n3 = n / 100;
  n2 = (n - n3*100) / 10;
  n1 = n - n3*100 - n2*10;

  if(n1 == 7 || n2 == 7 || n3 == 7){
    printf("Yes\n");
  }
  else{
    printf("No\n");
  }

  return 0;
  }