user: Please show me the C implementation that matches the assembly code listed below:

```asm
<main>:
  endbr64
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x10,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  mov    $0x0,%edi
  call   <time@plt>
  mov    %eax,%edi
  mov    $0x0,%eax
  call   <srand@plt>
  mov    $0x18,%edi
  call   <malloc@plt>
  mov    %rax,%rbx
  mov    $0x3,%edi
  call   <malloc@plt>
  mov    %rax,(%rbx)
  mov    $0x3,%edi
  call   <malloc@plt>
  mov    %rax,0x8(%rbx)
  mov    $0x3,%edi
  call   <malloc@plt>
  mov    %rax,0x10(%rbx)
  lea    D34(%rip),%r14
  lea    D74(%rip),%r13
  lea    D38(%rip),%r12
  jmp    L156
L160:
  mov    %r12,%rdi
  call   <puts@plt>
L57:
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <displayboard@plt>
L93:
  cmp    $0x2d,%bpl
  jne    L133
L158:
  mov    $0x78,%esi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <human_move@plt>
  movslq %eax,%rbx
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <displayboard@plt>
  mov    $0x78,%esi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <checkwin@plt>
  mov    %eax,%ebp
  cmp    $0x78,%al
  je     L93
  cmp    $0x20,%al
  je     L93
  mov    $0x78,%edx
  mov    $0x6f,%esi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <computer_move@plt>
  test   %eax,%eax
  je     L160
  mov    $0x6f,%esi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <checkwin@plt>
  mov    %eax,%ebp
  jmp    L57
L136:
  mov    %r12,%rdi
  call   <puts@plt>
  jmp    L169
L110:
  cmp    $0x2d,%bpl
  jne    L133
L106:
  mov    $0x78,%edx
  mov    $0x6f,%esi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <computer_move@plt>
  test   %eax,%eax
  je     L136
  mov    $0x6f,%esi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <checkwin@plt>
  mov    %eax,%ebp
L169:
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <displayboard@plt>
  cmp    $0x6f,%bpl
  je     L110
  cmp    $0x20,%bpl
  je     L110
  mov    $0x78,%esi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <human_move@plt>
  movslq %eax,%rbx
  mov    $0x78,%esi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <checkwin@plt>
  mov    %eax,%ebp
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <displayboard@plt>
  jmp    L110
L133:
  cmp    $0x20,%bpl
  je     L163
  movsbl %bpl,%esi
  lea    D48(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
L152:
  lea    D37(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    0x6(%rsp),%rsi
  lea    D62(%rip),%rdi
  mov    $0x0,%eax
  call   <scanf@plt>
  mov    $0x0,%eax
  call   <getchar@plt>
  cmpb   $0x79,0x6(%rsp)
  jne    L134
L156:
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <initboard@plt>
  movslq %eax,%rbx
  movb   $0x79,0x5(%rsp)
  mov    %r14,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    0x5(%rsp),%rsi
  mov    %r13,%rdi
  mov    $0x0,%eax
  call   <scanf@plt>
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <displayboard@plt>
  cmpb   $0x79,0x5(%rsp)
  jne    L106
  jmp    L158
L163:
  lea    D3(%rip),%rdi
  call   <puts@plt>
  jmp    L152
L134:
  mov    (%rbx),%rdi
  call   <free@plt>
  mov    0x8(%rbx),%rdi
  call   <free@plt>
  mov    0x10(%rbx),%rdi
  call   <free@plt>
  mov    %rbx,%rdi
  call   <free@plt>
  lea    D66(%rip),%rdi
  call   <puts@plt>
  mov    0x8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L17
  mov    $0x0,%eax
  add    $0x10,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  ret
L17:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: read_data
arguments: data_tag: D34
type: string
name: read_data
arguments: data_tag: D74
type: string
name: read_data
arguments: data_tag: D38
type: string
name: read_data
arguments: data_tag: D48
type: string
name: read_data
arguments: data_tag: D37
type: string
name: read_data
arguments: data_tag: D62
type: string
name: read_data
arguments: data_tag: D3
type: string
name: read_data
arguments: data_tag: D66
type: string

tool: D34: Play first? 

tool: D74: %c

tool: D38: 
Computer passed

tool: D48: THE WINNER IS %c!


tool: D37: 
Play again (y)?: 

tool: D62: %s

tool: D3: IT'S A TIE.

tool: D66: 
Thank you for playing.


assistant: ```c
int main() {
  srand((time(0)));
  int i, j;
  char again[2], winner, **board, agin = 'y';
  board = (char **)malloc(sizeof(char *) * 3);
  for (i = 0; i < 3; i++)
    board[i] = (char *)malloc(sizeof(char) * 3);
  do {
    board = initboard(board);
    char first = 'y';
    printf("Play first? ");
    scanf("%c", &first);
    displayboard(board);
    if (first == 'y') {
      do {
        board = human_move(board, 'x');
        displayboard(board);
        winner = checkwin(board, 'x');
        if (winner != 'x' && winner != ' ') {
          if (computer_move(board, 'o', 'x'))
            winner = checkwin(board, 'o');
          else
            printf("\nComputer passed\n");
          displayboard(board);
        }
      } while (winner == '-');
    } else {
      do {
        if (computer_move(board, 'o', 'x'))
          winner = checkwin(board, 'o');
        else
          printf("\nComputer passed\n");
        displayboard(board);
        if (winner != 'o' && winner != ' ') {
          board = human_move(board, 'x');
          winner = checkwin(board, 'x');
          displayboard(board);
        }
      } while (winner == '-');
    }
    if (winner != ' ')
      printf("THE WINNER IS %c!\n", winner);
    else
      printf("IT'S A TIE.\n");
    printf("\nPlay again (y)?: ");
    scanf("%s", again);
    getchar();
  } while (again[0] == 'y');
  for (i = 0; i < 3; i++)
    free(board[i]);
  free(board);
  printf("\nThank you for playing.\n\n");
  return 0;
}
```