user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<main>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  lea    -0x3d0000(%rsp),%r11
L52:
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  cmp    %r11,%rsp
  jne    L52
  sub    $0xcf8,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x3d0ce8(%rsp)
  xor    %eax,%eax
  lea    0xfa0(%rsp),%rbp
  lea    0x3d18a0(%rsp),%r12
  mov    %rbp,%rdx
L112:
  lea    -0xfa0(%rdx),%rax
L50:
  movl   $0x0,(%rax)
  add    $0x4,%rax
  cmp    %rdx,%rax
  jne    L50
  add    $0xfa0,%rdx
  cmp    %r12,%rdx
  jne    L112
  lea    D55(%rip),%rsi
  lea    D12(%rip),%rdi
  call   <fopen@plt>
  mov    %rax,%rbx
  test   %rax,%rax
  je     L111
L53:
  lea    0x3d0900(%rsp),%r13
  jmp    L108
L111:
  lea    D12(%rip),%rsi
  lea    D6(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  jmp    L53
L56:
  mov    %rsp,%rsi
  mov    $0x0,%edx
  mov    %r13,%rdi
  call   <parse@plt>
L108:
  mov    %rbx,%rdx
  mov    $0x3e8,%esi
  mov    %r13,%rdi
  call   <fgets@plt>
  test   %rax,%rax
  jne    L56
  mov    %rbx,%rdi
  call   <fclose@plt>
  mov    $0x0,%ebx
L33:
  lea    -0xfa0(%rbp),%rax
L42:
  cmpl   $0x1,(%rax)
  setg   %dl
  movzbl %dl,%edx
  add    %edx,%ebx
  add    $0x4,%rax
  cmp    %rbp,%rax
  jne    L42
  add    $0xfa0,%rbp
  cmp    %r12,%rbp
  jne    L33
  lea    D55(%rip),%rsi
  lea    D12(%rip),%rdi
  call   <fopen@plt>
  mov    %rax,%rbp
  test   %rax,%rax
  je     L69
L139:
  lea    0x3d0900(%rsp),%r12
  jmp    L91
L69:
  lea    D12(%rip),%rsi
  lea    D6(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  jmp    L139
L48:
  mov    %rsp,%rsi
  mov    $0x1,%edx
  mov    %r12,%rdi
  call   <parse@plt>
L91:
  mov    %rbp,%rdx
  mov    $0x3e8,%esi
  mov    %r12,%rdi
  call   <fgets@plt>
  test   %rax,%rax
  jne    L48
  mov    %ebx,%esi
  lea    D85(%rip),%rdi
  call   <printf@plt>
  mov    %rbp,%rdi
  call   <fclose@plt>
  mov    0x3d0ce8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L76
  mov    $0x0,%eax
  add    $0x3d0cf8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L76:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: extract_symbolic_data
arguments: tag: D55
type_guessed: string
name: extract_symbolic_data
arguments: tag: D12
type_guessed: string
name: extract_symbolic_data
arguments: tag: D6
type_guessed: string
name: extract_symbolic_data
arguments: tag: D85
type_guessed: string

tool: D55: r

tool: D12: input.txt

tool: D6: error opening: %s


tool: D85: Claimed squares: %d


assistant: ```c
int main() {
  FILE *fd;
  char str[1000];
  int fabric[1000][1000];
  int i, j, claims = 0;
  char *filename = "input.txt";
  for (i = 0; i < 1000; i++) {
    for (j = 0; j < 1000; j++) {
      fabric[i][j] = 0;
    }
  }
  fd = fopen(filename, "r");
  if (fd == NULL) {
    printf("error opening: %s\n", filename);
  }
  while (fgets(str, 1000, fd) != NULL) {
    parse(str, fabric, 0);
  }
  fclose(fd);
  for (i = 0; i < 1000; i++) {
    for (j = 0; j < 1000; j++) {
      if (fabric[i][j] >= 2) {
        claims++;
      }
    }
  }
  fd = fopen(filename, "r");
  if (fd == NULL) {
    printf("error opening: %s\n", filename);
  }
  while (fgets(str, 1000, fd) != NULL) {
    parse(str, fabric, 1);
  }
  printf("Claimed squares: %d\n", claims);
  fclose(fd);
  return 0;
}
```