user: 请将这段汇编代码片段转换成等效的C代码:

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  lea    -0x64000(%rsp),%r11
L179:
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  cmp    %r11,%rsp
  jne    L179
  sub    $0x50,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  mov    $0x19000,%edi
  call   <malloc@plt>
  mov    %rax,-0x64020(%rbp)
  mov    -0x64020(%rbp),%rax
  mov    %rax,-0x64018(%rbp)
  lea    -0x64010(%rbp),%rax
  mov    $0x64000,%edx
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <memset@plt>
  movl   $0x1,-0x64034(%rbp)
  lea    -0x64040(%rbp),%rdx
  lea    -0x64044(%rbp),%rax
  mov    %rax,%rsi
  lea    D7(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <scanf@plt>
  mov    -0x64020(%rbp),%rax
  mov    %rax,%rsi
  lea    D13(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <scanf@plt>
  mov    -0x64040(%rbp),%eax
  mov    %eax,-0x6403c(%rbp)
  mov    -0x64044(%rbp),%eax
  mov    %eax,%edx
  shr    $0x1f,%edx
  add    %edx,%eax
  sar    %eax
  sub    $0x1,%eax
  mov    %eax,-0x64038(%rbp)
  mov    -0x64044(%rbp),%eax
  mov    %eax,%edx
  shr    $0x1f,%edx
  add    %edx,%eax
  sar    %eax
  mov    %eax,-0x6403c(%rbp)
  mov    -0x64044(%rbp),%eax
  and    $0x1,%eax
  test   %eax,%eax
  je     L0
  addl   $0x1,-0x6403c(%rbp)
  jmp    L0
L117:
  mov    -0x6403c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x64020(%rbp),%rax
  add    %rdx,%rax
  mov    %rax,-0x64028(%rbp)
  mov    -0x64038(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x64020(%rbp),%rax
  add    %rdx,%rax
  mov    %rax,-0x64030(%rbp)
  mov    -0x64028(%rbp),%rax
  movzbl (%rax),%edx
  mov    -0x64030(%rbp),%rax
  movzbl (%rax),%eax
  cmp    %al,%dl
  je     L20
  mov    -0x64028(%rbp),%rax
  movzbl (%rax),%edx
  mov    -0x64030(%rbp),%rax
  movzbl (%rax),%eax
  cmp    %al,%dl
  jle    L100
  mov    -0x64028(%rbp),%rax
  movzbl (%rax),%edx
  mov    -0x64030(%rbp),%rax
  mov    %dl,(%rax)
  jmp    L36
L100:
  mov    -0x64030(%rbp),%rax
  movzbl (%rax),%edx
  mov    -0x64028(%rbp),%rax
  mov    %dl,(%rax)
L36:
  mov    -0x64028(%rbp),%rax
  sub    -0x64020(%rbp),%rax
  movl   $0x1,-0x64010(%rbp,%rax,4)
  mov    -0x64030(%rbp),%rdx
  sub    -0x64020(%rbp),%rdx
  mov    -0x64010(%rbp,%rax,4),%eax
  mov    %eax,-0x64010(%rbp,%rdx,4)
  mov    -0x64040(%rbp),%eax
  sub    $0x1,%eax
  mov    %eax,-0x64040(%rbp)
L20:
  addl   $0x1,-0x6403c(%rbp)
  subl   $0x1,-0x64038(%rbp)
L0:
  mov    -0x64040(%rbp),%eax
  test   %eax,%eax
  je     L238
  cmpl   $0x0,-0x64038(%rbp)
  js     L238
  mov    -0x64044(%rbp),%eax
  cmp    %eax,-0x6403c(%rbp)
  jl     L117
L238:
  mov    -0x64040(%rbp),%eax
  test   %eax,%eax
  je     L269
  movl   $0x0,-0x64038(%rbp)
  mov    -0x64044(%rbp),%eax
  sub    $0x1,%eax
  mov    %eax,-0x6403c(%rbp)
  jmp    L163
L155:
  mov    -0x64038(%rbp),%eax
  cltq
  mov    -0x64010(%rbp,%rax,4),%eax
  test   %eax,%eax
  je     L195
  mov    -0x64038(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x64020(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x39,%al
  je     L195
  mov    -0x64038(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x64020(%rbp),%rax
  add    %rdx,%rax
  movb   $0x39,(%rax)
  mov    -0x6403c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x64020(%rbp),%rax
  add    %rdx,%rax
  movb   $0x39,(%rax)
  mov    -0x64040(%rbp),%eax
  sub    $0x1,%eax
  mov    %eax,-0x64040(%rbp)
  jmp    L118
L195:
  mov    -0x64040(%rbp),%eax
  cmp    $0x1,%eax
  jle    L118
  mov    -0x64038(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x64020(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x39,%al
  je     L118
  mov    -0x64038(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x64020(%rbp),%rax
  add    %rdx,%rax
  movb   $0x39,(%rax)
  mov    -0x6403c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x64020(%rbp),%rax
  add    %rdx,%rax
  movb   $0x39,(%rax)
  mov    -0x64040(%rbp),%eax
  sub    $0x1,%eax
  mov    %eax,-0x64040(%rbp)
  mov    -0x64040(%rbp),%eax
  sub    $0x1,%eax
  mov    %eax,-0x64040(%rbp)
L118:
  addl   $0x1,-0x64038(%rbp)
  subl   $0x1,-0x6403c(%rbp)
L163:
  mov    -0x64038(%rbp),%eax
  cmp    -0x6403c(%rbp),%eax
  jge    L91
  mov    -0x64040(%rbp),%eax
  test   %eax,%eax
  jne    L155
L91:
  mov    -0x64038(%rbp),%eax
  cmp    -0x6403c(%rbp),%eax
  jne    L269
  mov    -0x64040(%rbp),%eax
  test   %eax,%eax
  je     L269
  mov    -0x64038(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x64020(%rbp),%rax
  add    %rdx,%rax
  movb   $0x39,(%rax)
L269:
  mov    -0x64020(%rbp),%rax
  mov    %rax,-0x64030(%rbp)
  mov    -0x64044(%rbp),%eax
  cltq
  lea    -0x1(%rax),%rdx
  mov    -0x64020(%rbp),%rax
  add    %rdx,%rax
  mov    %rax,-0x64028(%rbp)
  jmp    L173
L102:
  mov    -0x64030(%rbp),%rax
  movzbl (%rax),%edx
  mov    -0x64028(%rbp),%rax
  movzbl (%rax),%eax
  cmp    %al,%dl
  je     L251
  movl   $0x0,-0x64034(%rbp)
  jmp    L134
L251:
  addq   $0x1,-0x64030(%rbp)
  subq   $0x1,-0x64028(%rbp)
L173:
  mov    -0x64030(%rbp),%rax
  cmp    -0x64028(%rbp),%rax
  jbe    L102
L134:
  cmpl   $0x0,-0x64034(%rbp)
  je     L142
  mov    -0x64020(%rbp),%rax
  mov    %rax,%rdi
  call   <puts@plt>
  jmp    L39
L142:
  lea    D29(%rip),%rax
  mov    %rax,%rdi
  call   <puts@plt>
L39:
  mov    -0x64020(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    $0x0,%eax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L156
  call   <__stack_chk_fail@plt>
L156:
  leave
  ret
```

tool_calls: name: unpack_data
arguments: data_label: D7
datatype: string
name: unpack_data
arguments: data_label: D13
datatype: string
name: unpack_data
arguments: data_label: D29
datatype: string

tool: D7: %d %d

tool: D13: %s

tool: D29: -1

assistant: ```c
int main() {
  int n;
  int k;
  char *number = (char *)malloc(102400 * sizeof(char));
  char *iter = number, *mid, *fh, *sh;
  unsigned int change[102400] = {0};
  int j, i, palin = 1;
  scanf("%d %d", &n, &k);
  scanf("%s", number);
  j = k;
  i = n / 2 - 1;
  j = n / 2;
  if (n % 2)
    j = j + 1;
  while (k && (i >= 0) && (j < n)) {
    sh = &(number[j]);
    fh = &(number[i]);
    if (*sh != *fh) {
      (*sh > *fh) ? (*fh = *sh) : (*sh = *fh);
      change[fh - number] = change[sh - number] = 1;
      k--;
    }
    j++;
    i--;
  }
  if (k) {
    i = 0;
    j = n - 1;
    while (i < j && k) {
      if (change[i] && (number[i] != '9')) {
        number[i] = '9';
        number[j] = '9';
        k--;
      } else if ((k >= 2) && (number[i] != '9')) {
        number[i] = '9';
        number[j] = '9';
        k--;
        k--;
      }
      i++;
      j--;
    }
    if ((i == j) && k) {
      number[i] = '9';
    }
  }
  fh = number;
  sh = number + n - 1;
  while (fh <= sh) {
    if (*fh != *sh) {
      palin = 0;
      break;
    }
    fh++;
    sh--;
  }
  if (palin) {
    printf("%s\n", number);
  } else
    printf("-1\n");
  free(number);
  return 0;
}
```