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  1. Prepare
  2. Algorithms
  3. Sorting
  4. Counting Sort 1
  5. Discussions

Counting Sort 1

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467 Discussions

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  • afzal_saiyed931
     + 0 comments
    def countingSort(arr):
    # Write your code here
    
    r = [0] * 100
    for i in arr:
        r[i] += 1
       
    return r

  • yashdeora98294
     + 0 comments

    Here is problem solution in python java c++ c and javascript - https://programmingoneonone.com/hackerrank-counting-sort-1-problem-solution.html

  • alban_tyrex
     + 0 comments

    Here is my c++ solution, you can watch the explanation here : https://youtu.be/snADwNvEEcM

    vector<int> countingSort(vector<int> arr) {
    vector<int> count(100, 0);
    for(int i = 0; i < arr.size(); i++) count[arr[i]]++;
    return count;
}

  • emhhacker
     + 0 comments

    My Java solution with o(n) time complexity and o(1) space complexity:

    public static List<Integer> countingSort(List<Integer> arr) {
        // init freq array
        int[] freqArr = new int[100];
        
        //update freq for each val
        for(int element : arr) freqArr[element]++;
        
        //return int array converted into Integer list
        return Arrays.stream(freqArr)
            .boxed()
            .collect(Collectors.toList());
    }

  • patrickgao2020
     + 0 comments

    Here is my simple Python solution!

    def countingSort(arr):
    frequency = [0 for i in range(100)]
    for num in arr:
        frequency[num] += 1
    return frequency