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  1. Prepare
  2. Algorithms
  3. Sorting
  4. Correctness and the Loop Invariant
  5. Discussions

Correctness and the Loop Invariant

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196 Discussions

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  • alban_tyrex
     + 0 comments

    Here is my c++ solution, you can watch the explanation here : https://youtu.be/G0rl1U-fDRY

    void insertionSort(int N, int arr[]) {
    int i,j;
    int value;
    for(i=1;i<N;i++)
    {
        value=arr[i];
        j=i-1;
        while(j>=0 && value<arr[j])
        {
            arr[j+1]=arr[j];
            j=j-1;
        }
        arr[j+1]=value;
    }
    for(j=0;j<N;j++)
    {
        printf("%d",arr[j]);
        printf(" ");
    }
}

  • franm_voisard
     + 0 comments

    C++ 20 and C++14 code came empty. C++ 11 is Ok

  • claudelounou75
     + 0 comments

    while(j>=0 && value

  • urvi2682005
     + 0 comments

    java

    public static void insertionSort(int[] A) {

        Arrays.sort(A);

    printArray(A);

    } }

  • abrahamanju
     + 0 comments

    Python: Modifying j>0 to j>=0 is the only change.

    def insertion_sort(l):
    for i in range(1, len(l)):
        j = i-1
        key = l[i]
        while (j >= 0) and (l[j] > key):
           l[j+1] = l[j]
           j -= 1
        l[j+1] = key

m = int(input().strip())
ar = [int(i) for i in input().strip().split()]
insertion_sort(ar)
print(" ".join(map(str,ar)))