#include<iostream>
using namespace std;


void merge(int arr[], int l, int m, int r)
{
    int i, j, k;
    int n1 = m - l + 1;
    int n2 =  r - m;


    int L[n1], R[n2];


    for (i = 0; i < n1; i++)
        L[i] = arr[l + i];
    for (j = 0; j < n2; j++)
        R[j] = arr[m + 1+ j];


    i = 0;
    j = 0;
    k = l;
    while (i < n1 && j < n2)
    {
        if (L[i] <= R[j])
        {
            arr[k] = L[i];
            i++;
        }
        else
        {
            arr[k] = R[j];
            j++;
        }
        k++;
    }


    while (i < n1)
    {
        arr[k] = L[i];
        i++;
        k++;
    }


    while (j < n2)
    {
        arr[k] = R[j];
        j++;
        k++;
    }
}


void mergeSort(int arr[], int l, int r)
{
    if (l < r)
    {

        int m = l+(r-l)/2;


        mergeSort(arr, l, m);
        mergeSort(arr, m+1, r);

        merge(arr, l, m, r);
    }
}


void printArray(int A[], int size)
{
    int i;
    for (i=0; i < size; i++)
        cout << A[i];
    cout << endl;
}


int main()
{
    int arr_size;
    cout << "Enter Size Of The Array : ";
    cin >> arr_size;
    int arr[arr_size];

    for(int i = 0; i<arr_size;i++){
        cin >> arr[i];
    }

    cout << "Given array is " << endl;
    printArray(arr, arr_size);

    mergeSort(arr, 0, arr_size - 1);

    cout << ("\nSorted array is ") << endl;
    printArray(arr, arr_size);

}