using System;
class KthSmallestFinder
{
public static int FindKthSmallestNumber(int[] arr, int k) {
Array.Sort(arr);
return arr[k - 1];
}
static void Main()
{
int[] arr = { 42, 90, 21, 30, 37, 81, 45 };
int k = 3;
int result = FindKthSmallestNumber(arr, k);
Console.WriteLine(result);
}
}
/*
run:
37
*/