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 Go (1.14.1) (judge verdict: Accepted)

package main

import (
	"fmt"
)

func main() {
	var S int
	fmt.Scan(&S)

	x := 100
	counter := 0
	for i:=0; i<3; i++ {
		res := S / x
		if res == 7 {
			counter = 1
			fmt.Println("Yes")
			break
		}
		y := res * x
		S -= y
		x /= 10
	}
	if counter == 0 {
		fmt.Println("No")
	}

}