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>
#include<stdlib.h>


int Merge(int,int,int);
void MergeSort(int,int);

int A[500000],L[500000],R[500000];
int c=0;
int INFTY=1000000;

int Merge(int left, int mid, int right){
  int i,k,n1,n2,j;

n1 = mid - left;
 for(i=0;i<n1;i++){
   L[i]=A[left+i];
 }
 L[n1]=INFTY;

n2 = right - mid;

 for(i=0;i<n2;i++){
   R[i] = A[mid + i];
 }
 R[n2]=INFTY;
  

 i=0;
 j=0;
 for( k = left;k< right;k++){
   c++; 
  if(L[i] <= R[j]){
     A[k] = L[i];
     i = i + 1;
   }
  else{
    A[k] = R[j];
	 j = j + 1;
       }
 }

}
   void MergeSort(int left, int right){
     int mid;
     if( left+1 < right){
   mid = (left + right)/2;
   MergeSort( left, mid);
     MergeSort( mid, right);
     Merge( left, mid, right);
     }}

   int main(){
     int i;
     int n;
 
     scanf("%d", &n);
     for(i=0;i<n;i++){
	 scanf("%d", &A[i]);
       }
 
     MergeSort(0, n);
 
     for(i=0;i<n-1;i++){       
	 printf("%ld ", A[i]);
       }
     printf("%d\n", A[n-1]);
     printf("%d\n",c);
 
     return 0;
   }