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# (.NET Core 3.1.201) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Runtime.Serialization;
using System.Security.Cryptography.X509Certificates;

namespace hello_world
{ class Program
	{
		static void Main(string[] args)
		{
			bool a = false;
			int n = int.Parse(Console.ReadLine());
			if ((n % 10) == 7)
				a = true;
			else if (((n % 100) / 10) == 7)
				a = true;
			else if (((n / 10) / 10) == 7)
				a = true;
			if (a == true)
				Console.WriteLine("Yes");
			else
				Console.WriteLine("No");
			
		}
	}

}