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: Wrong Answer)

#include<stdio.h>

int main() {
    int a,t,rem;
    scanf("%d",&t);
    if(t>=100 && t<1000){
        while(t>0){
            rem = t%10;
            t = t/10;
            if(rem==7){
                a = 2;
            }
        }
        if(a==2){
            printf("Yes\n");
        }
        else
            printf("No\n");
    }

    return 0;
}