Problem:
Merge Sort

Write a program of a Merge Sort algorithm implemented by the following pseudocode. You should also report the number of comparisons in the Merge function.

Merge(A, left, mid, right)
n1 = mid - left;
n2 = right - mid;
create array L[0...n1], R[0...n2]
for i = 0 to n1-1
do L[i] = A[left + i]
for i = 0 to n2-1
do R[i] = A[mid + i]
L[n1] = SENTINEL
R[n2] = SENTINEL
i = 0;
j = 0;
for k = left to right-1
if L[i] <= R[j]
then A[k] = L[i]
i = i + 1
else A[k] = R[j]
j = j + 1

Merge-Sort(A, left, right){
if left+1 < right
then mid = (left + right)/2;
call Merge-Sort(A, left, mid)
call Merge-Sort(A, mid, right)
call Merge(A, left, mid, right)

Input

In the first line n is given. In the second line, n integers are given.

Output

In the first line, print the sequence S. Two consequtive elements should be separated by a space character.

In the second line, print the number of comparisons.

Constraints

n ≤ 500000

0 ≤ an element in S ≤ 109

Sample Input 1

10
8 5 9 2 6 3 7 1 10 4

Sample Output 1

1 2 3 4 5 6 7 8 9 10
34

Notes

Solution in C (judge verdict: Wrong Answer)

#include <stdio.h>
#define MAX 500000
#define INFTY 10000000

void mergeSort(int A[],int,int);
void merge(int A[],int,int,int);
int left,right,A[MAX],n,count=0;

int main(){
  int i,j;
  
  scanf("%d",&n);

  for(i=0;i<n;i++){
    scanf("%d",&A[i]);
  }
  left = 0;
  right = n;

  mergeSort(A,left,right);

  for(i=0;i<n-1;i++){
    printf("%d ",A[i]);
  }
  printf("%d\n",A[n-1]);
  printf("%d\n",count);



  return 0;
}


void mergeSort(int A[],int left,int right){
  if(left+1<right){
    int mid = (left + right)/2;
    mergeSort(A,left,mid);
    mergeSort(A,mid,right);
    merge(A,left,mid,right);
  }
}

void merge(int A[],int left,int mid,int right){
int n1,n2,i,j,k;

 n1 = mid - left;
 n2 = right - mid;
 
 int L[n1],R[n2];
 for(i=0;i<n1;i++){
   L[i] = A[left+i];
 }
 for(j=0;j<n2;j++){
   R[j] = A[mid+j];
 }
 
 L[n1] = INFTY;
 R[n2] = INFTY;
 i = 0;
 j = 0;
 
for (k=left;k<right;k++){
  count++;

  if (L[i] <= R[j]){
    A[k] = L[i];
    i++;
  }
   else{
    A[k] = R[j];
    j++;
  }

 }

}