criyle/codenet-compile-errors huggingface dataset:
Language: C

#define _CRT_SECURE_NO_WARNINGS
#define _USE_MATH_DEFINES
#include<stdio.h>
#include<stdlib.h>
void merge(int*, int, int, int,int*);
void mergeSort(int*, int, int,int*);
int main() {
	int *S, n, i,cnt=0;
	scanf("%d", &n);
	S = (int*)calloc(n, sizeof(int));
	for (i = 0; i < n; i++)scanf("%d", S + i);
	mergeSort(S, 0, n,&cnt);
	for (i = 0; i < n; i++)printf("%d%c", *(S + i), i < n - 1 ? ' ' : '\n');
	printf("%d\n", cnt);
	free(S);
	return 0;
}

void merge(int *A, int l, int m, int r,int* cnt) {
	int n1 = m - l, n2 = r - m, *L, *R, i, j, k;
	n1 = m - l;
	n2 = r - m;
	L = (int*)malloc(sizeof(int)*n1);
	R = (int*)malloc(sizeof(int)*n2);
	for (i = 0; i < n1; i++) *(L + i) = *(A + l + i);
	for (i = 0; i < n2; i++) *(R + i) = *(A + m + i);
	*(L + n1) = INT_MAX;
	*(R + n2) = INT_MAX;
	for (k = l, i = j = 0; k < r; k++) {
		*(cnt)+=1;
		if (*(L + i) <= *(R + j)) { *(A + k) = *(L + i); ++i; }
		else { *(A + k) = *(R + j); ++j; }
		
	}
	//free(L); free(R);
}

void mergeSort(int *A, int l, int r,int *cnt) {
	int m;
	if (l + 1 < r) {
		m = (l + r) / 2;
		mergeSort(A, l, m,cnt);
		mergeSort(A, m, r,cnt);
		merge(A, l, m, r,cnt);
	}
}

Compiler output:
main.c: In function 'merge':
main.c:27:21: error: 'INT_MAX' undeclared (first use in this function)
   27 |         *(L + n1) = INT_MAX;
      |                     ^~~~~~~
main.c:5:1: note: 'INT_MAX' is defined in header '<limits.h>'; this is probably fixable by adding '#include <limits.h>'
    4 | #include<stdlib.h>
  +++ |+#include <limits.h>
    5 | void merge(int*, int, int, int,int*);
main.c:27:21: note: each undeclared identifier is reported only once for each function it appears in
   27 |         *(L + n1) = INT_MAX;
      |                     ^~~~~~~
Language: C

#include <stdio.h>
int count=0;
void MergeSort(int x[],int left,int right){
  int mid,i,j,k,temp[n];
  if(left>=right) return;
  mid=(left+right)/2;
  MergeSort(x,left,mid);
  MergeSort(x,mid+1,right);
  for(i=left;i<=mid;i++){
    temp[i]=x[i];
  }
  for(i=mid+1,j=right;i<=right;i++,j--){
    temp[i]=x[j];
  }
  i=left;
  j=right;
  for(k=left;k<=right;k++){
    if(temp[i]<=temp[j]){
      x[k]=temp[i++];
    }
    else x[k]=temp[j--];
    count++;
  }
}
int main(){
  int i;
  scanf("%d",&n);
  int x[n];
  for(i=0;i<n;i++){
    scanf("%d",&x[i]);
  }
  MergeSort(x,0,n-1);
  for(i=0;i<n;i++){
    printf("%d",x[i]);
    if(i!=n-1){
      printf(" ");
    }
  }
  printf("\n%d\n",count);
  return 0;
}

Compiler output:
main.c: In function 'MergeSort':
main.c:4:22: error: 'n' undeclared (first use in this function)
    4 |   int mid,i,j,k,temp[n];
      |                      ^
main.c:4:22: note: each undeclared identifier is reported only once for each function it appears in
main.c: In function 'main':
main.c:27:15: error: 'n' undeclared (first use in this function)
   27 |   scanf("%d",&n);
      |               ^
Language: C

#include<stdio.h>
#define N 500000
#define INFTY 1000000000

void merge(int ,int, int,int);
void mergeSort(int ,int, int);
int count;

int main(){
  int s,i,A[N];

  scanf("%d", &s);
  for(i=0;i<s;i++);
  mergeSort(A,0,s);
  for(i=0;i<s-1;i++);
  printf("%d\n", A[i]);
  printf("%d\n", count);
  return 0;
}

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+1], R[n2+1];
  for(i = 0 ; i < n1 ; i++) L[i] = A[left + i];
  for(i = 0 ; i < n2 ; i++) R[i] = A[mid + i];
  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++;
    }
  }
}
void mergeSort(int A[],int left,int right){
  int mid;
  if (left+1 < right){
    mid = (left + right)/2;
    mergeSort(A, left, mid);
    mergeSort(A, mid, right);
    merge(A, left, mid, right);
  }
}

Compiler output:
main.c: In function 'main':
main.c:14:13: error: passing argument 1 of 'mergeSort' makes integer from pointer without a cast [-Wint-conversion]
   14 |   mergeSort(A,0,s);
      |             ^
      |             |
      |             int *
main.c:6:16: note: expected 'int' but argument is of type 'int *'
    6 | void mergeSort(int ,int, int);
      |                ^~~
main.c: At top level:
main.c:21:6: error: conflicting types for 'merge'; have 'void(int *, int,  int,  int)'
   21 | void merge(int A[],int left,int mid,int right){
      |      ^~~~~
main.c:5:6: note: previous declaration of 'merge' with type 'void(int,  int,  int,  int)'
    5 | void merge(int ,int, int,int);
      |      ^~~~~
main.c:44:6: error: conflicting types for 'mergeSort'; have 'void(int *, int,  int)'
   44 | void mergeSort(int A[],int left,int right){
      |      ^~~~~~~~~
main.c:6:6: note: previous declaration of 'mergeSort' with type 'void(int,  int,  int)'
    6 | void mergeSort(int ,int, int);
      |      ^~~~~~~~~
Language: C

#include<stdio.h>
#define MAX 500000
#define INFTY 1000000000
int L[MAX], R[MAX];
int c = 0;
void merge(int*, int, int, int);
void mergeSort(int*, int, int);
int main(){
  int i;
  int A[MAX], n;    
  scanf("%d", &n);
  for (i=0; i<n; i++){
    scanf("%d", &A[i]);
    if (A[i] >= INFTY ){
      return 1;
    }
  }
   
  mergeSort(A, 0, n);
 
  for (i=0; i<n; i++){
    if ( i ) printf(" ");
    printf("%d", A[i]);
    }
  printf("\n"); 
  printf("%d\n", count);
  return 0;
}
 
void merge(int A[], int left, int mid, int right){  
  int i,j,k,n1,n2;
   n1 = mid - left;
   n2 = right - mid;
   for(i=0; i<n1; i++){
     L[i] = A[left + i];
   }    
   for (i=0; i<n2; i++){
     R[i] = A[mid + i];
   }  
  L[n1] = INFTY;
  R[n2] = INFTY;
  i = 0;
  j = 0;
   
  for (k=left; k<=right-1; 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 A[], int left, int right ){
  int mid;  
  if (left+1 < right){
    mid = (left + right)/2;
    mergeSort(A, left, mid);
    mergeSort(A, mid, right);
    merge(A, left, mid, right);
  }
}

Compiler output:
main.c: In function 'main':
main.c:26:18: error: 'count' undeclared (first use in this function)
   26 |   printf("%d\n", count);
      |                  ^~~~~
main.c:26:18: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include <stdio.h>


int temp[MAX_DATA],num1=0;
int x[500000];/* ????°???§???????????¨????????????????????????????????? */

int MergeSort(int x[ ], int left, int right);
int main(void);

  /* ?????? x[ ] ??? left ?????? right ???????´??????????????????????????????? */
int MergeSort(int x[ ], int left, int right)
{
    int mid, i, j, k;
	
    if (left >= right)              /* ?????????????´?????????¨????????? */
        return;                     /* ?????????????????§?????? */

                                    /* ????????§??????????????????????????? */
    mid = (left + right) / 2;       /* ?????????????????? */
    MergeSort(x, left, mid);        /* ???????????°???????????? */
    MergeSort(x, mid + 1, right);   /* ???????????°???????????? */

      /* x[left] ?????? x[mid] ???????\??????????????????? */
    for (i = left; i <= mid; i++)
        temp[i] = x[i];

      /* x[mid + 1] ?????? x[right] ????????????????????? */
    for (i = mid + 1, j = right; i <= right; i++, j--)
        temp[i] = x[j];

    i = left;         /* i ??¨j ???????\????????????????????????? */
    j = right;        /* k ????????????????´??????????????????? */

    for (k = left; k <= right; k++){
      num1++;/* ?°??????????????????????????????? */
      if (temp[i] <= temp[j]) x[k] = temp[i++];
      else x[k] = temp[j--];
    }
    return 0;
}

int main(void)
{
  int i,n;
      /* ??????????????????????????? */

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

    MergeSort(x, 0, MAX_DATA - 1);

      /* ?????????????????????????????¨??? */
    //    printf("????????????\n");
    for (i = 0; i < n; i++){
        printf("%d", x[i]);
	if(i<n)printf(" ");
	else break;
    }
    printf("\n%d",num1);
    return 0;
}

Compiler output:
main.c:4:10: error: 'MAX_DATA' undeclared here (not in a function)
    4 | int temp[MAX_DATA],num1=0;
      |          ^~~~~~~~
main.c: In function 'MergeSort':
main.c:16:9: error: 'return' with no value, in function returning non-void [-Wreturn-mismatch]
   16 |         return;                     /* ?????????????????§?????? */
      |         ^~~~~~
main.c:11:5: note: declared here
   11 | int MergeSort(int x[ ], int left, int right)
      |     ^~~~~~~~~
Language: C

#include <stdio.h>



int temp[MAX_DATA],num1=0;
int x[500000];/* ????°???§???????????¨????????????????????????????????? */

void MergeSort(int x[ ], int left, int right);
void main(void);

  /* ?????? x[ ] ??? left ?????? right ???????´??????????????????????????????? */
void MergeSort(int x[ ], int left, int right)
{
    int mid, i, j, k;
	
    if (left >= right)              /* ?????????????´?????????¨????????? */
        return;                     /* ?????????????????§?????? */

                                    /* ????????§??????????????????????????? */
    mid = (left + right) / 2;       /* ?????????????????? */
    MergeSort(x, left, mid);        /* ???????????°???????????? */
    MergeSort(x, mid + 1, right);   /* ???????????°???????????? */

      /* x[left] ?????? x[mid] ???????\??????????????????? */
    for (i = left; i <= mid; i++)
        temp[i] = x[i];

      /* x[mid + 1] ?????? x[right] ????????????????????? */
    for (i = mid + 1, j = right; i <= right; i++, j--)
        temp[i] = x[j];

    i = left;         /* i ??¨j ???????\????????????????????????? */
    j = right;        /* k ????????????????´??????????????????? */

    for (k = left; k <= right; k++){
      num1++;/* ?°??????????????????????????????? */
      if (temp[i] <= temp[j]) x[k] = temp[i++];
      else x[k] = temp[j--];
    }
    return;
}

void main(void)
{
  int i,n;
      /* ??????????????????????????? */

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

    MergeSort(x, 0, MAX_DATA - 1);

      /* ?????????????????????????????¨??? */
    //    printf("????????????\n");
    for (i = 0; ; i++){
        printf("%d", x[i]);
	if(i<n-1)printf(" ");
	else break;
    }
    printf("\n%d\n",num1);
    return;
}

Compiler output:
main.c:5:10: error: 'MAX_DATA' undeclared here (not in a function)
    5 | int temp[MAX_DATA],num1=0;
      |          ^~~~~~~~
Language: C

#include <stdio.h>



int temp[500000],num1=0;
int x[500000];/* ????°???§???????????¨????????????????????????????????? */

void MergeSort(int x[ ], int left, int right);
void main(void);

  /* ?????? x[ ] ??? left ?????? right ???????´??????????????????????????????? */
void MergeSort(int x[ ], int left, int right)
{
    int mid, i, j, k;
	
    if (left >= right)              /* ?????????????´?????????¨????????? */
        return;                     /* ?????????????????§?????? */

                                    /* ????????§??????????????????????????? */
    mid = (left + right) / 2;       /* ?????????????????? */
    MergeSort(x, left, mid);        /* ???????????°???????????? */
    MergeSort(x, mid + 1, right);   /* ???????????°???????????? */

      /* x[left] ?????? x[mid] ???????\??????????????????? */
    for (i = left; i <= mid; i++)
        temp[i] = x[i];

      /* x[mid + 1] ?????? x[right] ????????????????????? */
    for (i = mid + 1, j = right; i <= right; i++, j--)
        temp[i] = x[j];

    i = left;         /* i ??¨j ???????\????????????????????????? */
    j = right;        /* k ????????????????´??????????????????? */

    for (k = left; k <= right; k++){
      num1++;/* ?°??????????????????????????????? */
      if (temp[i] <= temp[j]) x[k] = temp[i++];
      else x[k] = temp[j--];
    }
    return;
}

void main(void)
{
  int i,n;
      /* ??????????????????????????? */

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

    MergeSort(x, 0, MAX_DATA - 1);

      /* ?????????????????????????????¨??? */
    //    printf("????????????\n");
    for (i = 0; ; i++){
        printf("%d", x[i]);
	if(i<n-1)printf(" ");
	else break;
    }
    printf("\n%d\n",num1);
    return;
}

Compiler output:
main.c: In function 'main':
main.c:53:21: error: 'MAX_DATA' undeclared (first use in this function)
   53 |     MergeSort(x, 0, MAX_DATA - 1);
      |                     ^~~~~~~~
main.c:53:21: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#define SENTINEL 1000000000
#define MAX 500000
int count=0,n;
void Merge(int x[],int left,int mid,int right){
  int n1=mid-left;
  int n2=right-mid;
  int i,j,k;
  int L[n1],R[n2];
  for(i=0;i<n1;i++){
    L[i]=x[left+i];
  }
  for(i=0;i<n2;i++){
    R[i]=x[mid+i];
  }
  L[n1]=SENTINEL;
  R[n2]=SENTINEL;
  i=0;
  j=0;
  for(k=left;k<right;k++){
    if(L[i]<=R[j]){
      x[k]=L[I];
 i++;
    }
    else{
      x[k]=R[j];
      j++;
    }
    count++;
  }
}

void Merge_Sort(int x[],int left,int right){
  int mid;
  if(left+1<right){
    mid=(left+right)/2;
    Merge_Sort(x,left,mid);
    Merge_Sort(x,mid,right);
    Merge(x,left,mid,right);
  }
}
int main(){
  int i;
  scanf("%d",&n);
  int x[n];
  for(i=0;i<n;i++){
    scanf("%d",&x[i]);
  }
  Merge_Sort(x,0,n);
  for(i=0;i<n;i++){
    printf("%d",x[i]);
    if(i!=n-1){
      printf(" ");
    }
  }
  printf("\n%d\n",count);

  return 0;
}

Compiler output:
main.c: In function 'Merge':
main.c:21:14: error: 'I' undeclared (first use in this function)
   21 |       x[k]=L[I];
      |              ^
main.c:21:14: note: each undeclared identifier is reported only once for each function it appears in
main.c: In function 'main':
main.c:43:3: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
   43 |   scanf("%d",&n);
      |   ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | #define SENTINEL 1000000000
main.c:43:3: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
   43 |   scanf("%d",&n);
      |   ^~~~~
main.c:43:3: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:50:5: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
   50 |     printf("%d",x[i]);
      |     ^~~~~~
main.c:50:5: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:50:5: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:50:5: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:55:3: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
   55 |   printf("\n%d\n",count);
      |   ^~~~~~
main.c:55:3: note: include '<stdio.h>' or provide a declaration of 'printf'
Language: C

#include <stdio.h>

#define MAX 500000
#define SENTINEL 1000000000

void merge(int *, int, int, int);
void mergeSort(int *, int, int);

int S[MAX], k = 0;



int main()
{
  int n, i, left, right;

  scanf("%d", &n);
  for(i = 0; i < n; i++) scanf("%d", &S[i]);

  left = 0;
  right = n;

  mergeSort()

    for(i = 0; i < n; i++){
      if(i < n - 1) printf("%d", S[i]);
      else printf("%d\n %d\n", S[i], k);
    }
    
  return 0;
}

void mergeSort(int *A, int left, int right)
{
  int mid;
  
  if(left+1 < right)
    {
      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 = mid - left;
  int n2 = right - mid;
  int L[n1+1], R[n2+1], i, j, k;
  
  for(i=0; i<n1; i++){
    L[i] = A[left+i];
  }
  
  for(i=0; i<n2; i++){
    R[i] = A[mid+i];
  }
  
  L[n1] = SENTINEL;
  R[n2] = SENTINEL;
  
  i=0;
  j=0;
  
  for(k=left; k<right; k++){
    if(L[i] <= R[j]){
      A[k] = L[i];
      i = i + 1;
    }
    else{
      A[k] = R[j];
      j = j + 1;
    }
    count++;
  }
}

Compiler output:
main.c: In function 'main':
main.c:23:3: error: too few arguments to function 'mergeSort'
   23 |   mergeSort()
      |   ^~~~~~~~~
main.c:7:6: note: declared here
    7 | void mergeSort(int *, int, int);
      |      ^~~~~~~~~
main.c:23:14: error: expected ';' before 'for'
   23 |   mergeSort()
      |              ^
      |              ;
   24 | 
   25 |     for(i = 0; i < n; i++){
      |     ~~~       
main.c: In function 'merge':
main.c:75:5: error: 'count' undeclared (first use in this function)
   75 |     count++;
      |     ^~~~~
main.c:75:5: note: each undeclared identifier is reported only once for each function it appears in
Language: C


#include <stdio.h>

#define MAX 500000
#define SENTINEL 1000000000

void merge(int *, int, int, int);
void mergeSort(int *, int, int);

int S[MAX], k = 0;



int main()
{
  int n, i, left, right;

  scanf("%d", &n);
  for(i = 0; i < n; i++) scanf("%d", &S[i]);

  left = 0;
  right = n;

  mergeSort()

    for(i = 0; i < n; i++){
      if(i < n - 1) printf("%d", S[i]);
      else printf("%d\n %d\n", S[i], k);
    }
    
  return 0;
}

void mergeSort(int *A, int left, int right)
{
  int mid;
  
  if(left+1 < right)
    {
      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 = mid - left;
  int n2 = right - mid;
  int L[n1+1], R[n2+1], i, j, k1;
  
  for(i=0; i<n1; i++){
    L[i] = A[left+i];
  }
  
  for(i=0; i<n2; i++){
    R[i] = A[mid+i];
  }
  
  L[n1] = SENTINEL;
  R[n2] = SENTINEL;
  
  i=0;
  j=0;
  
  for(k1=left; k1<right; k1++){
    if(L[i] <= R[j]){
      A[k1] = L[i];
      i = i + 1;
    }
    else{
      A[k] = R[j];
      j = j + 1;
    }
    k++;
  }
}

Compiler output:
main.c: In function 'main':
main.c:24:3: error: too few arguments to function 'mergeSort'
   24 |   mergeSort()
      |   ^~~~~~~~~
main.c:8:6: note: declared here
    8 | void mergeSort(int *, int, int);
      |      ^~~~~~~~~
main.c:24:14: error: expected ';' before 'for'
   24 |   mergeSort()
      |              ^
      |              ;
   25 | 
   26 |     for(i = 0; i < n; i++){
      |     ~~~
Language: C

#include <stdio.h>
#define MAX 1000000000


void marge(int *,int,int,int);
void margeSort(int *,int,int);

void merge(int *A,int left,int mid,int right){

	int i,j,k,x,y;

	x = mid - left;
	y = right - mid;
	int n1[x],n2[y],L[x],R[y];


	for(i = 0; i < x; i++) L[i] = A[left + i];
  	for(i = 0; i < y; i++) R[i] = A[mid + i];

  	L[x] = MAX;
  	R[y] = MAX;
  	i = 0;
  	j = 0;

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

void mergeSort(int *A,int left,int right){

	int mid;

  	if(left+1 < right) mid = (left + right)/2;
    mergeSort(A,left,mid);
    mergeSort(A,mid,right);
    merge(A,left,mid,right);
}


int main(){

	int i,n,A[MAX];

	scanf("%d",&n);
	for(i = 0; i < n; i++) scanf("%d",&A[i]);
	margeSort(A,0,n-1);
}

Compiler output:
/usr/bin/ld: /tmp/ccDZMDv1.o: in function `main':
main.c:(.text+0x390): undefined reference to `margeSort'
collect2: error: ld returned 1 exit status
Language: C

#include<stdio.h>
#define N 500000
#define INFTY 200000000

void merge( int[], int, int, int );
void mergeSort( int[], int, int );

int count;

int main(){
  int s,i,A[N];
  
  scanf("%d",&s);
  for( i=0 ; i<s ; i++ ) scanf("%d",&A[i]);
  mergeSort(A,0,s);
  for( i=0 ; i<s ; i++ ){
    if( i!=0 ) printf(" ");
    printf("%d",A[i]);
  printf("\n%d\n", count);
  return 0;
}

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+1], R[n2+1];
  
  for( i=0 ; i<n1 ; i++ ) L[i] = A[ left+i ];
  for( i=0 ; i<n2 ; i++ ) R[i] = A[ mid+i ];
  
  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++;
    }
  }
}
void mergeSort( int A[], int left, int right ){
  int mid;
  if ( left+1<right ){
    mid = ( left+right ) / 2;
    mergeSort( A, left, mid );
    mergeSort( A, mid, right );
    merge( A, left, mid, right );
  }
}

Compiler output:
main.c: In function 'main':
main.c:58:1: error: expected declaration or statement at end of input
   58 | }
      | ^
Language: C

#include<stdio.h>
#define N 500000
#define INFTY 200000000

void merge( int[], int, int, int );
void mergeSort( int[], int, int );

int count;

int main(){
  int s,i,A[N];
  
  scanf("%d",&s);
  for( i=0 ; i<s ; i++ ) scanf("%d",&A[i]);
  mergeSort(A,0,s);
  for( i=0 ; i<s ; i++ ){
    if( i!=0 ) printf(" ");
    printf("%d",A[i]);
  }
  print("\n");
  printf("%d\n", count);
  return 0;
}

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+1], R[n2+1];
  
  for( i=0 ; i<n1 ; i++ ) L[i] = A[ left+i ];
  for( i=0 ; i<n2 ; i++ ) R[i] = A[ mid+i ];
  
  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++;
    }
  }
}

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

Compiler output:
main.c: In function 'main':
main.c:20:3: error: implicit declaration of function 'print'; did you mean 'printf'? [-Wimplicit-function-declaration]
   20 |   print("\n");
      |   ^~~~~
      |   printf
Language: C

#include <stdio.h>
#define MAX 500000
#define SENTINEL 2000000000
   
int L[MAX/2+2], R[MAX/2+2];
int count = 0;
   
void merge(int [], int, int, int);
void mergeSort(int [], int, int);
   
int main(){
  int A[MAX], n, i;
   
  scanf("%d", &n);
  for(i=0;i<n;i++){
    scanf("%d", &A[i]);
  }
  mergeSort(A, n, 0, n);
  for(i = 0;i < n;i++){
    if(i != 0) printf(" ");
    printf("%d", A[i]);
  }
  printf("\n");
  printf("%d\n", count);
  return 0;
}
   
void merge(int A[], int left, int mid, int right){
  int n1, n2, i, j, k;
   
  n1 = mid - left;
  n2 = right - mid;
  for(i=0;i<n1;i++){
    L[i] = A[left+i];
  }
  for(i=0;i<n2;i++){
    R[i] = A[mid+i];
  }
  L[n1] = R[n2] = SENTINEL;
  i = 0;
  j = 0;
  for(k=left;k<right;k++){
    count++;
    if(L[i] <= R[j]){
      A[k] = L[i++];
    }
    else A[k] = R[j++];
  }
}
   
void mergeSort(int A[], int left, int right){
  int mid;
   
  if(left+1 < right){
    mid = (left + right) / 2;
    mergeSort(A, left, mid);
    mergeSort(A, mid, right);
    merge(A, left, mid, right);
  }
}

Compiler output:
main.c: In function 'main':
main.c:18:3: error: too many arguments to function 'mergeSort'
   18 |   mergeSort(A, n, 0, n);
      |   ^~~~~~~~~
main.c:9:6: note: declared here
    9 | void mergeSort(int [], int, int);
      |      ^~~~~~~~~
Language: C

#include<stdio.h>
#define N 500000
#define INFTY 200000000

void merge( int[], int, int, int );
void mergeSort( int[], int, int );

int count;
int L[MAX/2+2], R[MAX/2+2];

int main(){
  int s,i,A[N];
  
  scanf("%d",&s);
  for( i=0 ; i<s ; i++ ) scanf("%d",&A[i]);
  mergeSort( A, 0, s );
  for( i=0 ; i<s ; i++ ){
    if( i ) printf(" ");
    printf("%d",A[i]);
  }
  printf("\n");
  printf("%d\n", count);
  return 0;
}

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

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

Compiler output:
main.c:9:7: error: 'MAX' undeclared here (not in a function)
    9 | int L[MAX/2+2], R[MAX/2+2];
      |       ^~~
Language: C

#include<stdio.h>
#define N 500000
#define INFTY 200000000

void merge( int[], int, int, int );
void mergeSort( int[], int, int );

int count;
int L[MAX/2+2], R[MAX/2+2];

int main(){
  int s,i,A[N];
  
  scanf("%d",&s);
  for( i=0 ; i<s ; i++ ) scanf("%d",&A[i]);
  mergeSort( A, 0, s );
  for( i=0 ; i<s ; i++ ){
    if( i!=0 ) printf(" ");
    printf("%d",A[i]);
  }
  printf("\n");
  printf("%d\n", count);
  return 0;
}

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

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

Compiler output:
main.c:9:7: error: 'MAX' undeclared here (not in a function)
    9 | int L[MAX/2+2], R[MAX/2+2];
      |       ^~~
Language: C

#include<stdio.h>
#define N 500000
#define INFTY 200000000

void merge( int[], int, int, int );
void mergeSort( int[], int, int );

int count;
int L[N/2+2], R[N/2+2];

int main(){
  int s,i,A[N];
  
  scanf("%d",&s);
  for( i=0 ; i<s ; i++ ) scanf("%d",&A[i]);
  mergeSort( A, 0, s );
  for( i=0 ; i<s ; i++ ){
    printf("%d",A[i]);
    if( i<n-1 ) printf(" ");
  }
  printf("\n");
  printf("%d\n", count);
  return 0;
}

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

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

Compiler output:
main.c: In function 'main':
main.c:19:11: error: 'n' undeclared (first use in this function)
   19 |     if( i<n-1 ) printf(" ");
      |           ^
main.c:19:11: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include <stdio.h>
#define INF 1111111111

int s[500090] = {};
int l[25045] = {};
int r[25045] = {};
int c ;

void merge(int left,int mid,int right){

  int i,j,k;
  int n1 = mid - left;
  int n2 = right - mid;

  for(i = 0;i < n1;i++) l[i] = s[left + i];
  for(i = 0;i < n2;i++) r[i] = s[mid + i];

  l[n1] = INF;
  r[n2] = INF;

  i = j = 0;
  
  for(k = left;k < right;k++){
    c++;
    if(l[i] <= r[j]){
      s[k] = l[i];
      i++;
    }
    else{
      s[k] = r[j];
      j++;
    }
  }
}

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

  
  left = 0;right = n;

  mergesort(left,right);

  for(i = 0;i < n;i++){
    if(i != n - 1) printf("%d ",s[i]);
    else printf("%d\n",s[i]);
  printf("%d\n",c);
}

Compiler output:
main.c: In function 'main':
main.c:64:1: error: expected declaration or statement at end of input
   64 | }
      | ^
Language: C

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

void merge(int *, int, int, int);
void mergeSort(int *, int, int);
int count = 0;

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

  
  mergeSort(A,0,n);

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

  return 0;
}

void merge(int *A,int left,int mid,int right){
  //printf("in merge func\n");
  int n1,n2,i,j,k,L[MAX],R[MAX];
  n1 = mid - left;
  n2 = right - mid;
  //count++;

  //printf("left: %d, middle: %d, right: %d\n", left, mid, right);

  //printf("debug for 1\n");
  for( i = 0; i < n1; i++){
    L[i] = A[left + i];
  }
  //printf("debug for 2\n");
  // error occurs in this for loop
  for(i = 0; i < n2; i++){
    R[i] = A[mid + i];
  }
  L[n1] = INFTY;
  R[n2] = INFTY;
  i = 0;
  j = 0;
  
  //printf("debug for 3\n");
  for(k = left; k < right; k++){
    count++;
    if(L[i] <= R[j]){
      A[k] = L[i];
      i = i + 1;
    }
    else{ 
      A[k] = R[j];
      j = j + 1;
    }
  }
  //printf("debug: ");
  for(i = 0;*(A+i) != NULL;i++){
    //printf("%d ",*(A+i));
  }
  //printf("\n");
}

void mergeSort(int *A,int left,int right){
  //static int checknum = 1;
  int i;
  int mid;
  //printf("%d: ", checknum);
  for(i = left;i < right;i++){
    //printf("%d ",*(A+i));
  }
  //checknum++;
  //printf("\n");
  if(left+1 < right){
    //count++;
    mid = (left + right)/2;
    mergeSort(A, left, mid);
    mergeSort(A, mid, right);
    merge(A, left, mid, right);

  }
}

Compiler output:
main.c: In function 'main':
main.c:10:12: error: array size missing in 'A'
   10 |   int i,n, A[];
      |            ^
main.c: In function 'merge':
main.c:67:20: warning: comparison between pointer and integer
   67 |   for(i = 0;*(A+i) != NULL;i++){
      |                    ^~
Language: C

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

}

void m

Compiler output:
main.c:1:9: error: expected declaration specifiers or '...' before string constant
    1 |   scanf("%d",&n);
      |         ^~~~
main.c:1:14: error: expected declaration specifiers or '...' before '&' token
    1 |   scanf("%d",&n);
      |              ^
main.c:2:3: error: expected identifier or '(' before 'for'
    2 |   for(i=0;i<n;i++){
      |   ^~~
main.c:2:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
    2 |   for(i=0;i<n;i++){
      |            ^
main.c:2:16: error: expected '=', ',', ';', 'asm' or '__attribute__' before '++' token
    2 |   for(i=0;i<n;i++){
      |                ^~
main.c:5:13: error: expected declaration specifiers or '...' before numeric constant
    5 |   mergeSort(0, n);
      |             ^
main.c:5:16: error: unknown type name 'n'
    5 |   mergeSort(0, n);
      |                ^
main.c:6:3: error: expected identifier or '(' before 'for'
    6 |   for(i=0;i<n-1;i++){
      |   ^~~
main.c:6:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
    6 |   for(i=0;i<n-1;i++){
      |            ^
main.c:6:18: error: expected '=', ',', ';', 'asm' or '__attribute__' before '++' token
    6 |   for(i=0;i<n-1;i++){
      |                  ^~
main.c:9:11: error: expected declaration specifiers or '...' before string constant
    9 |    printf("%d\n",A[i]);
      |           ^~~~~~
main.c:9:18: error: unknown type name 'A'
    9 |    printf("%d\n",A[i]);
      |                  ^
main.c:10:10: error: expected declaration specifiers or '...' before string constant
   10 |   printf("%d\n",count);
      |          ^~~~~~
main.c:10:17: error: unknown type name 'count'
   10 |   printf("%d\n",count);
      |                 ^~~~~
main.c:12:1: error: expected identifier or '(' before '}' token
   12 | }
      | ^
main.c:14:1: error: expected '=', ',', ';', 'asm' or '__attribute__' at end of input
   14 | void m
      | ^~~~
Language: C

Undefined			first referenced
 symbol  			    in file
margeSort                           /var/tmp//cc.kQHaa.o
ld: fatal: symbol referencing errors
collect2: error: ld returned 1 exit status

Compiler output:
main.c:1:1: error: unknown type name 'Undefined'
    1 | Undefined                       first referenced
      | ^~~~~~~~~
main.c:1:39: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'referenced'
    1 | Undefined                       first referenced
      |                                       ^~~~~~~~~~
main.c:1:39: error: unknown type name 'referenced'
Language: C

#include<stdio.h>
#define N 1000000
#define INFTY 1000000000
 
void merge(int*,int,int,int);
void mergeSort(int*,int,int);
int n,count=0;
 
 
int main(){
  int i,A[N],l,r;
 
  scanf("%d",&n);
  for(i=0;i<n;i++){
    scanf("%d",&A[i]);
  }
   
 
  mergeSort(A,0,n);
 
  for(i=0;i<n;i++){
    if(i>=1)printf(" ");
    printf("%d",A[i]);
  }
  printf("\n%d\n",count);
   
  return 0;
}
void mergeSort(int *s, int left, int right){
  int mid;
  if(left+1<right){
    mid=(left+right)/2;
    mergeSort(s,left,mid);
    mergeSort(s,mid,right);
    merge(s,left,mid,right);
  }
}
void merge(int *A, int left, int mid, int right){
  int i,j,k,n1,n2;
   
  n1=mid-left;
  n2=right-mid;
  int L[n1+1],R[n2+1];
  for(i=0;i<n1;i++){
    L[i]=A[left+i];
  }
  for(i=0;i<n2;i++){
    R[i]=A[mid+i];
  }
 
  L[n1]=INFTY;
  R[n2]=INFTY;
 
  i=0;
  j=0;
 
  for(k=left;k<right;k++){
    if(L[i]<=R[j]){
      A[k]=L[i];
      i=i+1;
    }
    else{
      A[k]=R[j]
      j=j+1;
    }
  }
  count+=(i+j);
}

Compiler output:
main.c: In function 'merge':
main.c:63:16: error: expected ';' before 'j'
   63 |       A[k]=R[j]
      |                ^
      |                ;
   64 |       j=j+1;
      |       ~
Language: C

#include <stdio.h>
#define INFTY 1000000000
void merge(int [],int, int, int); 
void mergesort(int [],int,int); 


int c=0; 


int main(){ 
  
  int i; 
  int left; 
  int right; 
  int mid; 
  int n; 
  int S[100000000; 
   
   
  scanf("%d ",&n); 
  for(i=0;i<n;i++){ 
     scanf("%d",&S[i]); 
   } 

   left=0; 
   right=n; 
   mergesort(S,left,right); 
        for(i=0;i<n;i++){ 
     printf("%d",S[i]);
     if(i==n-1) break;
     printf(" ");
   } 
   printf("\n"); 
   printf("%d\n",c); 

   return 0; 
 } 
 void merge(int S[],int left,int mid,int right) 
 { 
   int i,j; 
   int n1; 
   int n2; 
   int L[250000],R[250000]; 
   int k; 

   n1=mid-left; 
   n2=right-mid; 
   for(i=0;i<n1;i++){ 
     L[i]=S[left+i]; 
   } 
   for(i=0;i<n2;i++){ 
     R[i]=S[mid+i]; 
   } 
   L[n1]=INFTY; 
   R[n2]=INFTY; 
   i=0; 
   j=0; 

   for(k=left;k<right;k++){ 
     if(L[i]<=R[j]){ 
       S[k]=L[i]; 
       i++; 
       c++; 
     } 
     else { 
       S[k]=R[j]; 
       j++; 
       c++; 
      
     } 
   } 
 }
 void mergesort(int S[],int left, int right) 
 { 
   int mid; 
   if(left+1<right){ 
     mid=(left+right)/2; 
    mergesort(S,left,mid);
    mergesort(S,mid,right);
    merge(S,left,mid,right);
  }
}

Compiler output:
main.c: In function 'main':
main.c:17:18: error: expected ']' before ';' token
   17 |   int S[100000000;
      |                  ^
      |                  ]
main.c:82:1: error: expected declaration or statement at end of input
   82 | }
      | ^
Language: C

#include<stdio.h>
#define N 500000
#define M 200000
void merge(int *,int,int,int);
void mergesort(int *,int,int);
int L[(N/2)+2],R[(N/2)+2];
int count;

int main()
{
  int A[N],i,j;
  count=0;
  scanf("%d", &j);

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

void merge(int A[],int left,int mid,int right)
{
  int n1,n2,i,j,k;
  n1=mid-left;
  n2=right-mid;
  for(i=0;i<n1;i++)
    {
      L[i]=A[left+i];
    }
  for(i=0;i<n2;i++)
    {
      R[i]=A[mid+i];
    }
  L[n1]=M;
  R[n2]=M;
  i=0;
  j=0;
for (k = left;k < right;k++)
    {
      count++;
      if(L[i]=>R[j]){
        A[k]=R[j];
        j=j+1;
      }
      else{
        A[k]=L[i];
        i=i+1;
      }
    }
}

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

Compiler output:
main.c: In function 'merge':
main.c:48:15: error: expected expression before '>' token
   48 |       if(L[i]=>R[j]){
      |               ^
Language: C

#include<stdio.h>
#define N 500000

int A[N],B[N],count=0;

void Mergesort(int *A,int left,int right){

  int i,j,k,mid;
  if(right>l){

    mid=(right+left)/2;
    Mergesort(A,left,mid);
    Mergesort(A,mid+1,right);

    for(i=mid+1;i>l;i--)
      B[i-1] = A[i-1];

    for(j=mid; j<right; j++)
      B[right+mid-j]=A[j+1];

    for(k=left;k<=right;k++){
      A[k] = (B[i] < B[j])?B[i++]:B[j--];
      count++;
    }
  }
}
 
main(){
  int i,n;
  scanf("%d",&n);
  for(i=0;i<n;i++)
    scanf("%d",&a[i]);
  Mergesort(a,0,n-1);
  for(i=0;i<n-1;i++)
    printf("%d ",a[i]);
  printf("%d\n%d\n",a[n-1],count);
  return 0;
}

Compiler output:
main.c: In function 'Mergesort':
main.c:9:12: error: 'l' undeclared (first use in this function)
    9 |   if(right>l){
      |            ^
main.c:9:12: note: each undeclared identifier is reported only once for each function it appears in
main.c: At top level:
main.c:28:1: error: return type defaults to 'int' [-Wimplicit-int]
   28 | main(){
      | ^~~~
main.c: In function 'main':
main.c:32:17: error: 'a' undeclared (first use in this function)
   32 |     scanf("%d",&a[i]);
      |                 ^
Language: C

#include<stdio.h>
#define N 500000

int A[N],B[N],count=0;

void Mergesort(int *A,int left,int right){

  int i,j,k,mid;
  if(right>l){

    mid=(right+left)/2;
    Mergesort(A,left,mid);
    Mergesort(A,mid+1,right);

    for(i=mid+1;i>l;i--)
      B[i-1] = A[i-1];

    for(j=mid; j<right; j++)
      B[right+mid-j]=A[j+1];

    for(k=left; k<=right; k++){
      A[k] = (B[i]< B[j])?B[i++]:B[j--];
      count++;
    }
  }
}
 
int main(void){
  int i,n;
  scanf("%d",&n);
  for(i=0;i<n;i++)
    scanf("%d",&a[i]);
  Mergesort(a,0,n-1);
  for(i=0;i<n-1;i++)
    printf("%d ",a[i]);
  printf("%d\n%d\n",a[n-1],count);
  return 0;
}

Compiler output:
main.c: In function 'Mergesort':
main.c:9:12: error: 'l' undeclared (first use in this function)
    9 |   if(right>l){
      |            ^
main.c:9:12: note: each undeclared identifier is reported only once for each function it appears in
main.c: In function 'main':
main.c:32:17: error: 'a' undeclared (first use in this function)
   32 |     scanf("%d",&a[i]);
      |                 ^
Language: C

#include<stdio.h>
#define N 500000

int A[N],B[N],count=0;

void Mergesort(int *A,int left,int right){

  int i,j,k,mid;
  if(right>l){

    mid=(right+left)/2;
    Mergesort(A,left,mid);
    Mergesort(A,mid+1,right);

    for(i=mid+1;i>l;i--)
      B[i-1] = A[i-1];

    for(j=mid; j<right; j++)
      B[right+mid-j]=A[j+1];

    for(k=left; k<=right; k++){
      A[k] = (B[i]< B[j])?B[i++]:B[j--];
      count++;
    }
  }
}
 
int main(void){
  int i,n;
  scanf("%d",&n);
  for(i=0;i<n;i++)
    scanf("%d",&A[i]);
  Mergesort(A,0,n-1);
  for(i=0;i<n-1;i++)
    printf("%d ",A[i]);
  printf("%d\n%d\n",A[n-1],count);
  return 0;
}

Compiler output:
main.c: In function 'Mergesort':
main.c:9:12: error: 'l' undeclared (first use in this function)
    9 |   if(right>l){
      |            ^
main.c:9:12: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include<stdio.h>
#define MAX 500000
#define NIL 100000000
int L[MAX/2+2],R[MAX/2+2];
int cnt;
void merge(int A[],int left,int mid,int right){
  int i,j,k;
  int n1=mid-left;
  int n2=right-mid;
  for(i=0;i<n1;i++)L[i]=A[left+i];
  for(i=0;i<n2;i++)R[i]=A[mid+i];
  L[n1]=R[n2]=SENTINEL;
  i=0;
  j=0;
  for(k=left;k<right;k++){
    cnt++;
    if(L[i]<=R[j]){
      A[k]=L[i];
      i=i+1;
    }else{
      A[k]=R[j++];
      j=j+1;
    }
  }
}
void sort(int A[],int left,int right){
  if(left+1<right){
    int mid =(left+right)/2;
    sort(A,left,mid);
    sort(A,mid,right);
    merge(A,left,mid,right);
  }
}
int main(){
  int A[MAX],n,i;
  cnt=0;
  scanf("%d",&n);
  for(i=0;i<n;i++)scanf("%d",&A[i]);
  sort(A,0,n);
  for(i=0;i<n;i++){
    printf("%d ",A[i]);
  }
  printf("%d\n",A[i]);
  printf("%d\n",cnt);
  return 0;
}

Compiler output:
main.c: In function 'merge':
main.c:12:15: error: 'SENTINEL' undeclared (first use in this function)
   12 |   L[n1]=R[n2]=SENTINEL;
      |               ^~~~~~~~
main.c:12:15: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include <stdio.h>
#define N 500000
#define MAX 2000000000
 
void merge(int[], int, int, int);
void mergeSort(int[], int, int);
 
int L[(N/2)+2],R[(N/2)+2];
int count;
 
 
int main(){
 
  int i,n,A[N];
  cnt = 0;
 
  scanf("%d",&n);
  for(i=0;i<n;i++){
    scanf("%d",&A[i]);
  }
 
  mergeSort(A,0,n);
 
  for(i=0;i<n;i++){
    printf("%d",A[i]);
    if(i==n-1){
      printf("\n");
      break;
    }
    printf(" ");
  }
 
  printf("%d\n",count);
 
  return 0;
}
 
 
void merge(int A[], int left, int mid, int right){
  int n1,n2,i,j,k;
   
  n1 = mid - left;
  n2 = right - mid;
   
  for(i = 0; i <= n1; i++)
    L[i] = A[left+i];
  for(i = 0; i<= n2; i++)
    R[i] = A[mid+i];
 
   L[n1] = MAX;
   R[n2] = MAX;
 
    i = 0;
    j = 0;
    for(k = left;k < right; k++){
      count++;
      if(L[i] <= R[j]){
    A[k] = L[i];
    i = i + 1;
      }
      else{
    A[k] = R[j];
    j = j + 1;
      }
    }
 

Compiler output:
main.c: In function 'main':
main.c:15:3: error: 'cnt' undeclared (first use in this function); did you mean 'int'?
   15 |   cnt = 0;
      |   ^~~
      |   int
main.c:15:3: note: each undeclared identifier is reported only once for each function it appears in
main.c: In function 'merge':
main.c:65:5: error: expected declaration or statement at end of input
   65 |     }
      |     ^
Language: C

include<stdio.h>

#define N 500000

void merge(int, int, int);
void mergeSort(int, int);

int c=0;
int Q[N];
int L[N];
int R[N];

int main(){
int i, n;
  scanf("%d", &n);
  for(i=0 ; i<n ; i++) scanf("%d", &Q[i]);
  mergeSort(0, n);

  for(i=0 ; i<n-1 ; i++) printf("%d ", Q[i]);
  printf("%d\n", Q[i]);
  printf("%d\n", c);

  return 0;
}

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

  n1 = mid - left;
  n2 = right - mid;

  for(i=0 ; i<=n1-1 ; i++) L[i] = Q[left+i];
  for(i=0 ; i<=n2-1 ; i++) R[i] = Q[mid+i];

  L[n1] = 1000000000;
  R[n2] = 1000000000;
  i = 0;
  j = 0;

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

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);
  }
}

Compiler output:
main.c:1:8: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
    1 | include<stdio.h>
      |        ^
main.c: In function 'main':
main.c:15:3: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
   15 |   scanf("%d", &n);
      |   ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | include<stdio.h>
main.c:15:3: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
   15 |   scanf("%d", &n);
      |   ^~~~~
main.c:15:3: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:19:26: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
   19 |   for(i=0 ; i<n-1 ; i++) printf("%d ", Q[i]);
      |                          ^~~~~~
main.c:19:26: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:19:26: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:19:26: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:20:3: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
   20 |   printf("%d\n", Q[i]);
      |   ^~~~~~
main.c:20:3: note: include '<stdio.h>' or provide a declaration of 'printf'
Language: C

#include <stdio.h>

void merge(int, int, int, int);
void mergeSort(int, int, int);
int main()
{
  int left, mid, right;
  int n, S[500000];
  int i;
  
  scanf("%d", &n);
  for(i = 0; i < n; i++)
    scanf("%d", &S[i]);

  printf("\nn = %d\n", n);
  for(i = 0; i < n; i++)
    printf("S[%d] = %d\n", i, S[i]);
  printf("\n");

  left = S[0];
  right = S[n];
  if(n%2 == 0) mid = S[n/2+1];
  if(n%2 == 1) mid = S[(n+1)/2];
  
  return 0;
}

void merge(int S, int left, int mid, int right)
{
  int i, j, k;
  int n1 = mid - left;
  int n2 = right - mid;
  int L[250000], R[250000];
  // L[0...n1], R[0...n2] ?????????
  for(i = 0; i < n1; i++)
    L[i] = S[i];
  for(i = mid ; i < n2; i++)
    R[i] = S[i];
  for(i = 0; i < n1-1; i++)
    {
      L[i] = S[left+i];
      for(i = 0; i < n2-1; i++)
	{
	  R[i] = S[mid+i];
	  L[n1] = INFTY;
	  R[n2] = INFTY;
	  i = 0;
	  j = 0;
	  for(k = left; k < right-1; k++)
	    {
	      if(L[i] <= R[j])
		{
		  S[k] = L[i];
		  i = i + 1;
		  else
		    {
		      S[k] = R[j];
		      j = j + 1;
		    }
		}
	    }
	}
    }
}
void mergeSort(int S, int left, int right)
{
  int mid;
  if (left+1 < right)
    mid = (left + right)/2;
  mergeSort(S, left, mid);
  mergeSort(S, mid, right);
  merge(S, left, mid, right);
}

Compiler output:
main.c: In function 'merge':
main.c:36:13: error: subscripted value is neither array nor pointer nor vector
   36 |     L[i] = S[i];
      |             ^
main.c:38:13: error: subscripted value is neither array nor pointer nor vector
   38 |     R[i] = S[i];
      |             ^
main.c:41:15: error: subscripted value is neither array nor pointer nor vector
   41 |       L[i] = S[left+i];
      |               ^
main.c:44:19: error: subscripted value is neither array nor pointer nor vector
   44 |           R[i] = S[mid+i];
      |                   ^
main.c:45:19: error: 'INFTY' undeclared (first use in this function)
   45 |           L[n1] = INFTY;
      |                   ^~~~~
main.c:45:19: note: each undeclared identifier is reported only once for each function it appears in
main.c:53:20: error: subscripted value is neither array nor pointer nor vector
   53 |                   S[k] = L[i];
      |                    ^
main.c:55:19: error: expected '}' before 'else'
   55 |                   else
      |                   ^~~~
main.c:57:24: error: subscripted value is neither array nor pointer nor vector
   57 |                       S[k] = R[j];
      |                        ^
main.c: At top level:
main.c:64:1: error: expected identifier or '(' before '}' token
   64 | }
      | ^
Language: C

#include<stdio.h>
#include<math.h>

int A[500000], compare;

void merge(int left, int mid, int right){
  int n1 = mid - left, n2 = right - mid, L[n1 + 1], R[n2 + 1], i, k;
  for(i=0;i<n1;i++)
    L[i] = A[left + i]
  for(i=0;i<n2;i++)
    R[i] = A[mid + i];
  L[n1] = INFINITY;
  R[n2] = INFINITY;
  i = 0;
  j = 0;
  for(k=left;k<right;k++){
    if(L[i] <= R[j]){
      A[k] = L[i];
      i++;
    } else {
      A[k] = R[j];
      j++;
    }
  compare++;
  }
}

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

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

Compiler output:
main.c: In function 'merge':
main.c:9:23: error: expected ';' before 'for'
    9 |     L[i] = A[left + i]
      |                       ^
      |                       ;
   10 |   for(i=0;i<n2;i++)
      |   ~~~                  
main.c:12:11: warning: overflow in conversion from 'float' to 'int' changes value from '+Inff' to '2147483647' [-Woverflow]
   12 |   L[n1] = INFINITY;
      |           ^~~~~~~~
main.c:13:11: warning: overflow in conversion from 'float' to 'int' changes value from '+Inff' to '2147483647' [-Woverflow]
   13 |   R[n2] = INFINITY;
      |           ^~~~~~~~
main.c:15:3: error: 'j' undeclared (first use in this function)
   15 |   j = 0;
      |   ^
main.c:15:3: note: each undeclared identifier is reported only once for each function it appears in
main.c: In function 'mergeSort':
main.c:30:5: error: 'mid' undeclared (first use in this function)
   30 |     mid = (left + right)/2;
      |     ^~~