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() {
	int N;
	scanf("%d", &N);
	int j = 100;
	for (int i = 0; i < 3; i++) {
		int t = N / j;
		if (t == 7) {
			printf("Yes");
			return 0;
		}
		N = N - j * t;
		j = j / 10;
		//printf("%d %d %d\n",N, t, j);
	}
	printf("No");
	return 0;
}