Question

How to find the second smallest elements in an array in C#

Answer 1

using System;

class Program
{
    static int getTheSecondSmallest(int []arr) { 
        int first, second, size = arr.Length; 
      
        first = second = int.MaxValue; 
        for (int i = 0; i < size ; i ++) { 
            if (arr[i] < first) { 
                second = first; 
                first = arr[i]; 
            } 
            else if (arr[i] < second && arr[i] != first) 
                second = arr[i]; 
        } 
        if (second == int.MaxValue) 
            return -1;
              
        return second; 
    } 
    static void Main() {
        int []arr1= {34, 3, 8, 2, 9, 4, 6}; 
        Console.WriteLine(getTheSecondSmallest(arr1));
      
        int []arr2 = {1, 1, 2, 1, 1}; 
        Console.WriteLine(getTheSecondSmallest(arr2));
      
        int []arr3 = {5, 5, 5, 5, 5, 5, 5}; 
        Console.WriteLine(getTheSecondSmallest(arr3));
    }
}



/*
run:

3
2
-1

*/

 

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