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 str string

	_, _ = fmt.Scan(&str)

	if IsSevenExistingIn(str) {
		fmt.Println("Yes")
	} else {
		fmt.Println("No")
	}
}

func IsSevenExistingIn(str string) bool{
	for i := 0; i < len(str); i++{
		if str[i] == '7'{
			return true
		}
	}
	return false
}