user: Converte this assembly snippet into its equivalent C code:

```asm
<Ackermann>:
  endbr64
  test   %rdi,%rdi
  je     L237
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
L156:
  lea    -0x1(%rdi),%rax
  mov    %rax,0x18(%rsp)
  test   %rsi,%rsi
  jne    L251
  cmpq   $0x0,0x18(%rsp)
  je     L155
L202:
  mov    0x18(%rsp),%rax
L294:
  lea    -0x1(%rax),%rcx
  mov    %rcx,0x10(%rsp)
  test   %rsi,%rsi
  jne    L330
  cmpq   $0x0,0x10(%rsp)
  je     L228
L226:
  mov    0x10(%rsp),%rax
L176:
  lea    -0x1(%rax),%r14
  test   %rsi,%rsi
  jne    L265
  test   %r14,%r14
  je     L238
L36:
  mov    %r14,%rax
L406:
  lea    -0x1(%rax),%r13
  test   %rsi,%rsi
  jne    L392
  test   %r13,%r13
  je     L153
L46:
  mov    %r13,%rax
L263:
  lea    -0x1(%rax),%rdx
  test   %rsi,%rsi
  jne    L431
  test   %rdx,%rdx
  je     L173
L95:
  mov    %rdx,%rax
L168:
  lea    -0x1(%rax),%r15
  test   %rsi,%rsi
  jne    L171
  test   %r15,%r15
  je     L129
L73:
  mov    %r15,%rax
L35:
  lea    -0x1(%rax),%r12
  test   %rsi,%rsi
  jne    L276
  test   %r12,%r12
  je     L126
L105:
  mov    %r12,%rax
L82:
  lea    -0x1(%rax),%rbp
  test   %rsi,%rsi
  jne    L242
  test   %rbp,%rbp
  je     L243
L422:
  mov    %rbp,%rax
L161:
  lea    -0x1(%rax),%rbx
  test   %rsi,%rsi
  jne    L203
  test   %rbx,%rbx
  je     L297
L174:
  mov    %rbx,%rdi
  mov    %rdx,0x8(%rsp)
  call   <Ackermann>
  mov    0x8(%rsp),%rdx
  mov    %rax,%rsi
  mov    %rbx,%rax
  sub    $0x1,%rax
  jne    L161
  add    $0x1,%rsi
L223:
  mov    %rbp,%rax
  sub    $0x1,%rax
  jne    L82
  add    $0x1,%rsi
L252:
  mov    %r12,%rax
  sub    $0x1,%rax
  jne    L35
  add    $0x1,%rsi
L222:
  mov    %r15,%rax
  sub    $0x1,%rax
  jne    L168
  add    $0x1,%rsi
L329:
  mov    %rdx,%rax
  sub    $0x1,%rax
  jne    L263
  add    $0x1,%rsi
L414:
  mov    %r13,%rax
  sub    $0x1,%rax
  jne    L406
  add    $0x1,%rsi
L159:
  mov    %r14,%rax
  sub    $0x1,%rax
  jne    L176
  add    $0x1,%rsi
L48:
  mov    0x10(%rsp),%rax
  sub    $0x1,%rax
  jne    L294
  add    $0x1,%rsi
L76:
  mov    0x18(%rsp),%rdi
  sub    $0x1,%rdi
  jne    L156
  add    $0x28,%rsp
  lea    0x1(%rsi),%rax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopw   0x0(%rax,%rax,1)
L297:
  mov    $0x2,%esi
  jmp    L223
  nopw   0x0(%rax,%rax,1)
L243:
  mov    $0x2,%esi
  jmp    L252
  nopw   0x0(%rax,%rax,1)
L126:
  mov    $0x2,%esi
  jmp    L222
  nopw   0x0(%rax,%rax,1)
L129:
  mov    $0x2,%esi
  jmp    L329
  nopw   0x0(%rax,%rax,1)
L173:
  mov    $0x2,%esi
  jmp    L414
  nopw   0x0(%rax,%rax,1)
L153:
  mov    $0x2,%esi
  jmp    L159
  nopw   0x0(%rax,%rax,1)
L238:
  mov    $0x2,%esi
  jmp    L48
  nopw   0x0(%rax,%rax,1)
L203:
  sub    $0x1,%rsi
  mov    %rax,%rbx
  jmp    L174
  nopl   0x0(%rax)
L228:
  mov    $0x2,%esi
  jmp    L76
  nopw   0x0(%rax,%rax,1)
L242:
  sub    $0x1,%rsi
  mov    %rax,%rbp
  jmp    L422
  nopl   0x0(%rax)
L155:
  add    $0x28,%rsp
  mov    $0x2,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax)
L276:
  sub    $0x1,%rsi
  mov    %rax,%r12
  jmp    L105
  nopl   0x0(%rax)
L171:
  sub    $0x1,%rsi
  mov    %rax,%r15
  jmp    L73
  nopl   0x0(%rax)
L431:
  sub    $0x1,%rsi
  mov    %rax,%rdx
  jmp    L95
  nopl   0x0(%rax)
L392:
  sub    $0x1,%rsi
  mov    %rax,%r13
  jmp    L46
  nopl   0x0(%rax)
L265:
  sub    $0x1,%rsi
  mov    %rax,%r14
  jmp    L36
  nopl   0x0(%rax)
L237:
  lea    0x1(%rsi),%rax
  ret
  nopl   (%rax)
L330:
  mov    %rax,0x10(%rsp)
  sub    $0x1,%rsi
  jmp    L226
  cs nopw 0x0(%rax,%rax,1)
L251:
  mov    %rdi,0x18(%rsp)
  sub    $0x1,%rsi
  jmp    L202
```

assistant: ```c
unsigned long long int Ackermann(unsigned long long int m, unsigned long long int n) {
  if (m == 0) {
    return n + 1;
  }
  if (m > 0 && n == 0) {
    return Ackermann(m - 1, 1);
  }
  if (m > 0 && n > 0) {
    return Ackermann(m - 1, Ackermann(m, n - 1));
  }
}
```