HackerRank - Stryker world code sprint - study code - II

KthZero_studyCode_2.cs

using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;

class Solution {
    static void Main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution */
        string[] header = Console.ReadLine().Split(' ');
        int n = Int32.Parse(header[0]);
        int m = Int32.Parse(header[1]);
        
        //Maybe not best data class? Need to think about.
        SortedList<int, int> zero_indexes = new SortedList<int, int>();
        int[] array_A = Array.ConvertAll(Console.ReadLine().Split(' '), int.Parse);
        for(int i = 0; i<n; i++){
            if(array_A[i] == 0){
                zero_indexes.Add(i, i);
            }
        }
        
        for(int i = 0; i<m; i++){
           string[] line = Console.ReadLine().Split(' ');
           if(line[0] == "1"){
               int goal = Int32.Parse(line[2]);
               if(goal > zero_indexes.Count){
                   Console.WriteLine("NO");
               }else{
                   Console.WriteLine(zero_indexes.Values[goal-1]);
               }
           }else if(line[0] == "2"){
              int index = Int32.Parse(line[2]);
              int val = Int32.Parse(line[3]);
              if(zero_indexes.ContainsKey(index) && val != 0){
                 zero_indexes.Remove(index);
              }else if(!zero_indexes.ContainsKey(index) && val ==0){
                  zero_indexes.Add(index, index);
              }
           }
        }
    }
}