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: Runtime Error)

#include <stdio.h>

int main(){
  int N,flag=0;
  scanf("%d",N);

  if(N/100==7){
    flag = 1;
    if((N-N/100*100)/10==7){
      flag = 1;
      if((N-N/10*10)==7){
        flag = 1;
      }
    }
  }

  if(flag==1){
    printf("Yes");
  }
  else{
    printf("No");
  }
  return 0;
}