user: 这段汇编代码用C语言表示是什么样的：

```asm
<totalNQueens>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  mov    %edi,-0x34(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movl   $0x0,-0x30(%rbp)
  mov    -0x34(%rbp),%eax
  cltq
  mov    %rax,%rdi
  call   <malloc@plt>
  mov    %rax,-0x28(%rbp)
  mov    -0x34(%rbp),%eax
  add    %eax,%eax
  sub    $0x1,%eax
  cltq
  mov    %rax,%rdi
  call   <malloc@plt>
  mov    %rax,-0x20(%rbp)
  mov    -0x34(%rbp),%eax
  add    %eax,%eax
  sub    $0x1,%eax
  cltq
  mov    %rax,%rdi
  call   <malloc@plt>
  mov    %rax,-0x18(%rbp)
  movl   $0x0,-0x2c(%rbp)
  jmp    L65
L41:
  mov    -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  addl   $0x1,-0x2c(%rbp)
L65:
  mov    -0x2c(%rbp),%eax
  cmp    -0x34(%rbp),%eax
  jl     L41
  movl   $0x0,-0x2c(%rbp)
  jmp    L47
L8:
  mov    -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  mov    -0x2c(%rbp),%edx
  movslq %edx,%rcx
  mov    -0x20(%rbp),%rdx
  add    %rcx,%rdx
  movzbl (%rax),%eax
  mov    %al,(%rdx)
  addl   $0x1,-0x2c(%rbp)
L47:
  mov    -0x34(%rbp),%eax
  add    %eax,%eax
  sub    $0x1,%eax
  cmp    %eax,-0x2c(%rbp)
  jl     L8
  mov    -0x34(%rbp),%eax
  mov    %eax,%edi
  mov    $0x0,%eax
  call   <init_board@plt>
  cltq
  mov    %rax,-0x10(%rbp)
  mov    -0x34(%rbp),%edx
  mov    -0x10(%rbp),%rax
  mov    %edx,%esi
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <clear_board@plt>
  mov    -0x18(%rbp),%r8
  mov    -0x20(%rbp),%rdi
  mov    -0x28(%rbp),%rcx
  mov    -0x34(%rbp),%edx
  mov    -0x10(%rbp),%rsi
  lea    -0x30(%rbp),%rax
  sub    $0x8,%rsp
  push   $0x0
  mov    %r8,%r9
  mov    %rdi,%r8
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <aux@plt>
  add    $0x10,%rsp
  movl   $0x0,-0x2c(%rbp)
  jmp    L20
L52:
  mov    -0x2c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rax
  mov    %rax,%rdi
  call   <free@plt>
  addl   $0x1,-0x2c(%rbp)
L20:
  mov    -0x2c(%rbp),%eax
  cmp    -0x34(%rbp),%eax
  jl     L52
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x28(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x20(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x30(%rbp),%eax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L17
  call   <__stack_chk_fail@plt>
L17:
  leave
  ret
```

assistant: ```c
int totalNQueens(int n) {
  int num;
  char *col_mask;
  char *diag_mask;
  char *anti_diag_mask;
  char **board;
  num = 0;
  col_mask = malloc(sizeof(char) * n);
  diag_mask = malloc(sizeof(char) * (2 * n - 1));
  anti_diag_mask = malloc(sizeof(char) * (2 * n - 1));
  int i;
  for (i = 0; i < n; ++i) {
    col_mask[i] = 0;
  }
  for (i = 0; i < 2 * n - 1; ++i) {
    diag_mask[i] = anti_diag_mask[i] = 0;
  }
  board = init_board(n);
  clear_board(board, n);
  aux(&num, board, n, col_mask, diag_mask, anti_diag_mask, 0);
  for (i = 0; i < n; ++i) {
    free(board[i]);
  }
  free(board);
  free(col_mask);
  free(diag_mask);
  free(anti_diag_mask);
  return num;
}
```