user: What is the c source code of the assembly code below?

```asm
<main>:
  endbr64
  push   %r14
  xor    %eax,%eax
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  call   <getchar@plt>
  mov    D2(%rip),%r13
  cmp    0x0(%r13),%al
  je     L356
  mov    %eax,%ebx
  xor    %r12d,%r12d
L384:
  xor    %eax,%eax
  call   <getchar@plt>
  mov    %eax,%ebp
  test   %r12d,%r12d
  jne    L177
L361:
  cmp    $0x2f,%bl
  je     L228
  cmp    $0x22,%bl
  je     L425
  cmp    $0x27,%bl
  jne    L388
  mov    $0x27,%edi
  call   <putchar@plt>
  cmp    %bpl,0x0(%r13)
  je     L356
  xor    %eax,%eax
  call   <getchar@plt>
  mov    %eax,%r14d
L208:
  movsbl %bpl,%edi
  call   <putchar@plt>
  cmp    $0x5c,%bpl
  jne    L446
  cmp    %r14b,0x0(%r13)
  je     L356
  xor    %eax,%eax
  mov    $0x7,%r12d
  call   <getchar@plt>
  mov    %eax,%ebx
  jmp    L26
  nopl   0x0(%rax)
L228:
  cmp    $0x2a,%bpl
  je     L274
  cmp    $0x2f,%bpl
  je     L386
L388:
  movsbl %bl,%edi
  call   <putchar@plt>
  cmp    %bpl,0x0(%r13)
  je     L356
L185:
  xor    %eax,%eax
  mov    %ebp,%ebx
  call   <getchar@plt>
  mov    %eax,%ebp
  jmp    L361
L386:
  cmpb   $0x2f,0x0(%r13)
  je     L356
  xor    %eax,%eax
  mov    $0x3,%r12d
  call   <getchar@plt>
  mov    %eax,%ebx
L278:
  cmp    %bl,0x0(%r13)
  jne    L384
L356:
  pop    %rbx
  xor    %eax,%eax
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  ret
L425:
  mov    $0x22,%edi
  call   <putchar@plt>
  cmp    %bpl,0x0(%r13)
  je     L356
L1:
  xor    %eax,%eax
  mov    %ebp,%ebx
  call   <getchar@plt>
  mov    %eax,%ebp
L155:
  movsbl %bl,%edi
  call   <putchar@plt>
  cmp    $0x5c,%bl
  je     L0
  movzbl 0x0(%r13),%eax
  cmp    $0x22,%bl
  je     L311
  cmp    %bpl,%al
  jne    L1
  jmp    L356
L446:
  movzbl 0x0(%r13),%eax
  cmp    $0x27,%bpl
  je     L188
  cmp    %al,%r14b
  je     L356
  xor    %eax,%eax
  mov    %r14d,%ebp
  call   <getchar@plt>
  mov    %eax,%r14d
  jmp    L208
L177:
  cmp    $0x5,%r12d
  je     L155
  cmp    $0x4,%r12d
  je     L281
  mov    %ebx,%r14d
  mov    %eax,%ebx
L26:
  cmp    $0x1,%r12d
  sete   %dl
  cmp    $0x2a,%r14b
  sete   %al
  test   %al,%dl
  je     L242
  cmp    $0x2f,%bl
  je     L219
L242:
  cmp    $0x2,%r12d
  je     L397
  cmp    $0xa,%r14b
  jne    L97
  cmp    $0x3,%r12d
  je     L397
L97:
  cmp    $0x6,%r12d
  je     L306
  cmp    $0x7,%r12d
  jne    L278
  movsbl %r14b,%edi
  call   <putchar@plt>
  cmp    0x0(%r13),%bl
  je     L356
  xor    %eax,%eax
  mov    %ebx,%ebp
  call   <getchar@plt>
  mov    %eax,%r14d
  jmp    L208
L0:
  cmp    0x0(%r13),%bpl
  je     L356
  xor    %eax,%eax
  mov    %ebp,%r14d
  call   <getchar@plt>
  mov    %eax,%ebx
L306:
  movsbl %r14b,%edi
  call   <putchar@plt>
  cmp    0x0(%r13),%bl
  je     L356
  xor    %eax,%eax
  call   <getchar@plt>
  mov    %eax,%ebp
  jmp    L155
  nopl   (%rax)
L397:
  cmp    0x0(%r13),%bl
  je     L356
  xor    %eax,%eax
  call   <getchar@plt>
  mov    %eax,%ebp
  jmp    L361
L274:
  cmpb   $0x2a,0x0(%r13)
  je     L356
  xor    %eax,%eax
  mov    $0x2a,%r14d
  mov    $0x1,%r12d
  call   <getchar@plt>
  mov    %eax,%ebx
  jmp    L26
L311:
  cmp    %bpl,%al
  jne    L185
  jmp    L356
L188:
  cmp    %al,%r14b
  je     L356
  xor    %eax,%eax
  mov    %r14d,%ebx
  call   <getchar@plt>
  mov    %eax,%ebp
  jmp    L361
L219:
  cmpb   $0x2f,0x0(%r13)
  je     L356
  xor    %eax,%eax
  mov    $0x2f,%r14d
  mov    $0x2,%r12d
  call   <getchar@plt>
  mov    %eax,%ebx
  jmp    L26
L281:
  mov    %ebp,%r14d
  mov    %ebx,%ebp
  jmp    L208
```

assistant: ```c
int main() {
  char buf[2];
  int state;
  state = 0;
  buf[1] = getchar();
  while ((buf[0] = buf[1]) != EOF) {
    buf[1] = getchar();
    if (state == 0) {
      if (buf[0] == '/' && buf[1] == '*') {
        state = 1;
      } else if (buf[0] == '/' && buf[1] == '/') {
        state = 3;
      } else if (buf[0] == '"') {
        state = 5;
        putchar(buf[0]);
      } else if (buf[0] == '\'') {
        state = 4;
        putchar(buf[0]);
      } else {
        putchar(buf[0]);
      }
    } else if (state == 5) {
      putchar(buf[0]);
      if (buf[0] == '\\')
        state = 6;
      else if (buf[0] == '"')
        state = 0;
    } else if (state == 4) {
      putchar(buf[0]);
      if (buf[0] == '\\')
        state = 7;
      else if (buf[0] == '\'')
        state = 0;
    } else if (state == 1 && buf[0] == '*' && buf[1] == '/') {
      state = 2;
    } else if (state == 2) {
      state = 0;
    } else if (state == 3 && buf[0] == '\n') {
      state = 0;
    } else if (state == 6) {
      state = 5;
      putchar(buf[0]);
    } else if (state == 7) {
      state = 4;
      putchar(buf[0]);
    }
  }
}
```