Envío 6507

Código

#include <bits/stdc++.h>
using namespace std;

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

void merge(int arr[], int p, int q, int r) {
  int n1 = q - p + 1;
  int n2 = r - q;
  int L[n1], R[n2];
  for (int i = 0; i < n1; i++) L[i] = arr[p + i];
  for (int j = 0; j < n2; j++) R[j] = arr[q + 1 + j];
  int i = 0, j = 0, k = p;
  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 p, int r) {
  if(p < r) {
    int q = (p + r) / 2;
    mergeSort(arr, p, q);
    mergeSort(arr, q + 1, r);
    merge(arr, p, q, r);
  }
}

int main() {
  int n; cin>>n;
  int arr[n];
  for(int i = 0; i < n; i++) {
    cin>>arr[i];
  }
  mergeSort(arr, 0, n - 1);
  printArray(arr, n);
  return 0;
}