using System;

​

int x = 0;

Console.WriteLine("Enter a number of numbers");

int camut = int.Parse(Console.ReadLine());

int[] shani = new int[camut] ;

Console.WriteLine();

for (int i=0; i<camut; i++) {

    Console.Write("Enter the number " + (i+1) + ": ");

    int num = int.Parse(Console.ReadLine());

    shani[i] = num;

    int numY = num % 10 ;

    int numA = (num - numY) / 10; 

    if (num % 7 == 0 || numY == 7 || numA == 7) {

        x = num;

        Console.WriteLine("val:" + x + " idx:" + i);

    } else {

        Console.WriteLine("Not Found:");

    }

}

​