user: 请将以下的汇编代码转换成C语言代码:

```asm
<possibilities_naive>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x58,%rsp
  mov    %edi,0x44(%rsp)
  test   %edi,%edi
  je     L1266
  movq   $0x0,0x38(%rsp)
L841:
  mov    0x44(%rsp),%eax
  lea    -0x1(%rax),%esi
  mov    %esi,0x40(%rsp)
  cmp    $0x1,%eax
  je     L101
  movq   $0x0,0x30(%rsp)
L1472:
  mov    0x40(%rsp),%eax
  lea    -0x1(%rax),%edx
  mov    %edx,0x14(%rsp)
  cmp    $0x1,%eax
  je     L443
  movq   $0x0,0x20(%rsp)
L1326:
  mov    0x14(%rsp),%eax
  lea    -0x1(%rax),%ebx
  cmp    $0x1,%eax
  je     L823
  xor    %r12d,%r12d
  lea    -0x1(%rbx),%r14d
  cmp    $0x1,%ebx
  je     L647
L982:
  lea    -0x3(%rbx),%r15d
  xor    %ebp,%ebp
  mov    %r15d,%ecx
  jmp    L1106
  nopl   0x0(%rax)
L555:
  mov    0x8(%rsp),%ecx
  add    %r13,%rbp
  sub    $0x3,%ecx
  sub    $0x3,%r14d
  je     L380
L1106:
  lea    -0x1(%r14),%edi
  mov    %ecx,0x8(%rsp)
  call   <possibilities_naive>
  mov    %rax,%r13
  cmp    $0x1,%r14d
  je     L682
  mov    0x8(%rsp),%edi
  call   <possibilities_naive>
  add    %rax,%r13
  cmp    $0x2,%r14d
  jne    L555
L682:
  lea    0x0(%r13,%rbp,1),%rax
  mov    %ebx,%r13d
  mov    %rax,0x8(%rsp)
  sub    $0x2,%r13d
  je     L358
  sub    $0x4,%ebx
  xor    %ebp,%ebp
  jmp    L1112
  nopw   0x0(%rax,%rax,1)
L19:
  sub    $0x3,%ebx
  sub    $0x3,%r13d
  je     L306
L1112:
  lea    -0x1(%r13),%edi
  call   <possibilities_naive>
  mov    %rax,%r14
  cmp    $0x1,%r13d
  je     L760
  mov    %ebx,%edi
  call   <possibilities_naive>
  add    %rax,%r14
  add    %r14,%rbp
  cmp    $0x2,%r13d
  jne    L19
L612:
  add    0x8(%rsp),%rbp
  add    %rbp,%r12
  test   %r15d,%r15d
  je     L647
  mov    %r15d,%ebx
  lea    -0x1(%rbx),%r14d
  cmp    $0x1,%ebx
  jne    L982
L647:
  mov    $0x1,%r13d
L1192:
  mov    0x14(%rsp),%ebx
  lea    0x0(%r13,%r12,1),%rax
  mov    %rax,0x18(%rsp)
  sub    $0x2,%ebx
  je     L573
  movq   $0x0,0x8(%rsp)
  lea    -0x1(%rbx),%ebp
  cmp    $0x1,%ebx
  je     L1114
L1079:
  lea    -0x3(%rbx),%r14d
  xor    %r15d,%r15d
  mov    %r14d,%r13d
  jmp    L831
  nopl   0x0(%rax)
L845:
  add    %r12,%r15
  sub    $0x3,%r13d
  sub    $0x3,%ebp
  je     L889
L831:
  lea    -0x1(%rbp),%edi
  call   <possibilities_naive>
  mov    %rax,%r12
  cmp    $0x1,%ebp
  je     L1491
  mov    %r13d,%edi
  call   <possibilities_naive>
  add    %rax,%r12
  cmp    $0x2,%ebp
  jne    L845
L1491:
  lea    (%r12,%r15,1),%r13
  mov    %ebx,%r12d
  sub    $0x2,%r12d
  je     L756
L1074:
  lea    -0x4(%rbx),%r15d
  xor    %ebx,%ebx
  jmp    L590
  nopl   0x0(%rax)
L13:
  sub    $0x3,%r15d
  sub    $0x3,%r12d
  je     L490
L590:
  lea    -0x1(%r12),%edi
  call   <possibilities_naive>
  mov    %rax,%rbp
  cmp    $0x1,%r12d
  je     L814
  mov    %r15d,%edi
  call   <possibilities_naive>
  add    %rax,%rbp
  add    %rbp,%rbx
  cmp    $0x2,%r12d
  jne    L13
L17:
  add    %r13,%rbx
  add    %rbx,0x8(%rsp)
  test   %r14d,%r14d
  je     L1114
  mov    %r14d,%ebx
  lea    -0x1(%rbx),%ebp
  cmp    $0x1,%ebx
  jne    L1079
L1114:
  mov    0x8(%rsp),%r13
  add    $0x1,%r13
L1347:
  add    0x18(%rsp),%r13
  add    %r13,0x20(%rsp)
  subl   $0x3,0x14(%rsp)
  jne    L1326
L823:
  mov    $0x1,%eax
L700:
  add    0x20(%rsp),%rax
  mov    %rax,0x28(%rsp)
  mov    0x40(%rsp),%eax
  sub    $0x2,%eax
  mov    %eax,0x14(%rsp)
  je     L669
  movq   $0x0,0x20(%rsp)
L192:
  mov    0x14(%rsp),%eax
  lea    -0x1(%rax),%r12d
  cmp    $0x1,%eax
  je     L691
  movq   $0x0,0x8(%rsp)
  lea    -0x1(%r12),%ebx
  cmp    $0x1,%r12d
  je     L638
L1108:
  lea    -0x3(%r12),%r13d
  xor    %r15d,%r15d
  mov    %r13d,%ebp
  jmp    L52
  nopw   0x0(%rax,%rax,1)
L890:
  add    %r14,%r15
  sub    $0x3,%ebp
  sub    $0x3,%ebx
  je     L717
L52:
  lea    -0x1(%rbx),%edi
  call   <possibilities_naive>
  mov    %rax,%r14
  cmp    $0x1,%ebx
  je     L401
  mov    %ebp,%edi
  call   <possibilities_naive>
  add    %rax,%r14
  cmp    $0x2,%ebx
  jne    L890
L401:
  add    %r15,%r14
  mov    %r12d,%r15d
  sub    $0x2,%r15d
  je     L1370
L1405:
  lea    -0x4(%r12),%ebx
  xor    %ebp,%ebp
  jmp    L389
  nopw   0x0(%rax,%rax,1)
L910:
  sub    $0x3,%ebx
  sub    $0x3,%r15d
  je     L258
L389:
  lea    -0x1(%r15),%edi
  call   <possibilities_naive>
  mov    %rax,%r12
  cmp    $0x1,%r15d
  je     L150
  mov    %ebx,%edi
  call   <possibilities_naive>
  add    %rax,%r12
  add    %r12,%rbp
  cmp    $0x2,%r15d
  jne    L910
L4:
  add    %r14,%rbp
  add    %rbp,0x8(%rsp)
  test   %r13d,%r13d
  je     L638
  mov    %r13d,%r12d
  lea    -0x1(%r12),%ebx
  cmp    $0x1,%r12d
  jne    L1108
L638:
  mov    $0x1,%ebp
L388:
  mov    0x14(%rsp),%r12d
  add    0x8(%rsp),%rbp
  mov    %rbp,0x18(%rsp)
  sub    $0x2,%r12d
  je     L1003
  movq   $0x0,0x8(%rsp)
  lea    -0x1(%r12),%ebx
  cmp    $0x1,%r12d
  je     L1118
L321:
  lea    -0x3(%r12),%r13d
  xor    %r15d,%r15d
  mov    %r13d,%r14d
  jmp    L265
  nopl   0x0(%rax,%rax,1)
L247:
  add    %rbp,%r15
  sub    $0x3,%r14d
  sub    $0x3,%ebx
  je     L161
L265:
  lea    -0x1(%rbx),%edi
  call   <possibilities_naive>
  mov    %rax,%rbp
  cmp    $0x1,%ebx
  je     L600
  mov    %r14d,%edi
  call   <possibilities_naive>
  add    %rax,%rbp
  cmp    $0x2,%ebx
  jne    L247
L600:
  mov    %r12d,%r14d
  add    %r15,%rbp
  sub    $0x2,%r14d
  je     L1069
L1134:
  sub    $0x4,%r12d
  xor    %ebx,%ebx
  jmp    L942
  nopl   0x0(%rax,%rax,1)
L1170:
  sub    $0x3,%r12d
  sub    $0x3,%r14d
  je     L1320
L942:
  lea    -0x1(%r14),%edi
  call   <possibilities_naive>
  mov    %rax,%r15
  cmp    $0x1,%r14d
  je     L533
  mov    %r12d,%edi
  call   <possibilities_naive>
  add    %r15,%rax
  add    %rax,%rbx
  cmp    $0x2,%r14d
  jne    L1170
L645:
  add    %rbp,%rbx
  add    %rbx,0x8(%rsp)
  test   %r13d,%r13d
  je     L1118
  mov    %r13d,%r12d
  lea    -0x1(%r12),%ebx
  cmp    $0x1,%r12d
  jne    L321
L1118:
  mov    0x8(%rsp),%r13
  add    $0x1,%r13
L740:
  add    0x18(%rsp),%r13
  add    %r13,0x20(%rsp)
  subl   $0x3,0x14(%rsp)
  jne    L192
L691:
  mov    0x20(%rsp),%rax
  add    $0x1,%rax
L47:
  add    0x28(%rsp),%rax
  add    %rax,0x30(%rsp)
  subl   $0x3,0x40(%rsp)
  jne    L1472
L443:
  mov    $0x1,%eax
L821:
  add    0x30(%rsp),%rax
  mov    %rax,0x48(%rsp)
  mov    0x44(%rsp),%eax
  sub    $0x2,%eax
  mov    %eax,0x40(%rsp)
  je     L1013
  movq   $0x0,0x30(%rsp)
L1058:
  mov    0x40(%rsp),%eax
  lea    -0x1(%rax),%esi
  mov    %esi,0x14(%rsp)
  cmp    $0x1,%eax
  je     L725
  movq   $0x0,0x18(%rsp)
L888:
  mov    0x14(%rsp),%eax
  lea    -0x1(%rax),%ebx
  cmp    $0x1,%eax
  je     L201
  movq   $0x0,0x8(%rsp)
  lea    -0x1(%rbx),%ebp
  cmp    $0x1,%ebx
  je     L1362
L376:
  lea    -0x3(%rbx),%r13d
  xor    %r15d,%r15d
  mov    %r13d,%r14d
  jmp    L531
  nopw   0x0(%rax,%rax,1)
L80:
  add    %r12,%r15
  sub    $0x3,%r14d
  sub    $0x3,%ebp
  je     L1160
L531:
  lea    -0x1(%rbp),%edi
  call   <possibilities_naive>
  mov    %rax,%r12
  cmp    $0x1,%ebp
  je     L511
  mov    %r14d,%edi
  call   <possibilities_naive>
  add    %rax,%r12
  cmp    $0x2,%ebp
  jne    L80
L511:
  lea    (%r12,%r15,1),%r14
  mov    %ebx,%r12d
  sub    $0x2,%r12d
  je     L828
L1315:
  lea    -0x4(%rbx),%r15d
  xor    %ebx,%ebx
  jmp    L918
  nopl   0x0(%rax)
L202:
  sub    $0x3,%r15d
  sub    $0x3,%r12d
  je     L953
L918:
  lea    -0x1(%r12),%edi
  call   <possibilities_naive>
  mov    %rax,%rbp
  cmp    $0x1,%r12d
  je     L553
  mov    %r15d,%edi
  call   <possibilities_naive>
  add    %rax,%rbp
  add    %rbp,%rbx
  cmp    $0x2,%r12d
  jne    L202
L1117:
  add    %r14,%rbx
  add    %rbx,0x8(%rsp)
  test   %r13d,%r13d
  je     L1362
  mov    %r13d,%ebx
  lea    -0x1(%rbx),%ebp
  cmp    $0x1,%ebx
  jne    L376
L1362:
  mov    $0x1,%ebx
L448:
  mov    0x14(%rsp),%eax
  add    0x8(%rsp),%rbx
  mov    %eax,%ebp
  sub    $0x2,%ebp
  je     L896
  lea    -0x4(%rax),%r14d
  xor    %r12d,%r12d
  jmp    L175
  nopw   0x0(%rax,%rax,1)
L170:
  sub    $0x3,%r14d
  sub    $0x3,%ebp
  je     L44
L175:
  lea    -0x1(%rbp),%edi
  call   <possibilities_naive>
  mov    %rax,%r13
  cmp    $0x1,%ebp
  je     L998
  mov    %r14d,%edi
  call   <possibilities_naive>
  add    %r13,%rax
  add    %rax,%r12
  cmp    $0x2,%ebp
  jne    L170
  add    %rbx,%r12
  add    %r12,0x18(%rsp)
  subl   $0x3,0x14(%rsp)
  jne    L888
L201:
  mov    $0x1,%ebx
L225:
  mov    0x40(%rsp),%eax
  add    0x18(%rsp),%rbx
  mov    %rbx,0x28(%rsp)
  sub    $0x2,%eax
  mov    %eax,0x14(%rsp)
  je     L834
  movq   $0x0,0x20(%rsp)
L1413:
  mov    0x14(%rsp),%eax
  lea    -0x1(%rax),%r12d
  cmp    $0x1,%eax
  je     L547
  movq   $0x0,0x8(%rsp)
  lea    -0x1(%r12),%ebx
  cmp    $0x1,%r12d
  je     L1395
L1461:
  lea    -0x3(%r12),%r13d
  xor    %r15d,%r15d
  mov    %r13d,%r14d
  jmp    L226
  cs nopw 0x0(%rax,%rax,1)
L773:
  add    %rbp,%r15
  sub    $0x3,%r14d
  sub    $0x3,%ebx
  je     L1349
L226:
  lea    -0x1(%rbx),%edi
  call   <possibilities_naive>
  mov    %rax,%rbp
  cmp    $0x1,%ebx
  je     L171
  mov    %r14d,%edi
  call   <possibilities_naive>
  add    %rax,%rbp
  cmp    $0x2,%ebx
  jne    L773
L171:
  mov    %r12d,%r14d
  add    %r15,%rbp
  sub    $0x2,%r14d
  je     L346
L222:
  sub    $0x4,%r12d
  xor    %ebx,%ebx
  jmp    L212
  nopl   0x0(%rax,%rax,1)
L1339:
  sub    $0x3,%r12d
  sub    $0x3,%r14d
  je     L626
L212:
  lea    -0x1(%r14),%edi
  call   <possibilities_naive>
  mov    %rax,%r15
  cmp    $0x1,%r14d
  je     L766
  mov    %r12d,%edi
  call   <possibilities_naive>
  add    %r15,%rax
  add    %rax,%rbx
  cmp    $0x2,%r14d
  jne    L1339
L1125:
  add    %rbp,%rbx
  add    %rbx,0x8(%rsp)
  test   %r13d,%r13d
  je     L1395
  mov    %r13d,%r12d
  lea    -0x1(%r12),%ebx
  cmp    $0x1,%r12d
  jne    L1461
L1395:
  mov    $0x1,%ebp
L973:
  mov    0x14(%rsp),%ebx
  add    0x8(%rsp),%rbp
  mov    %rbp,0x18(%rsp)
  sub    $0x2,%ebx
  je     L1441
  movq   $0x0,0x8(%rsp)
  lea    -0x1(%rbx),%ebp
  cmp    $0x1,%ebx
  je     L1466
L775:
  lea    -0x3(%rbx),%r14d
  xor    %r13d,%r13d
  mov    %r14d,%r15d
  jmp    L1006
  nopl   0x0(%rax)
L963:
  add    %r12,%r13
  sub    $0x3,%r15d
  sub    $0x3,%ebp
  je     L418
L1006:
  lea    -0x1(%rbp),%edi
  call   <possibilities_naive>
  mov    %rax,%r12
  cmp    $0x1,%ebp
  je     L651
  mov    %r15d,%edi
  call   <possibilities_naive>
  add    %rax,%r12
  cmp    $0x2,%ebp
  jne    L963
L651:
  mov    %ebx,%r15d
  add    %r12,%r13
  sub    $0x2,%r15d
  je     L985
L1161:
  sub    $0x4,%ebx
  xor    %ebp,%ebp
  jmp    L456
  nop
L996:
  sub    $0x3,%ebx
  sub    $0x3,%r15d
  je     L72
L456:
  lea    -0x1(%r15),%edi
  call   <possibilities_naive>
  mov    %rax,%r12
  cmp    $0x1,%r15d
  je     L571
  mov    %ebx,%edi
  call   <possibilities_naive>
  add    %r12,%rax
  add    %rax,%rbp
  cmp    $0x2,%r15d
  jne    L996
L457:
  add    %r13,%rbp
  add    %rbp,0x8(%rsp)
  test   %r14d,%r14d
  je     L1466
  mov    %r14d,%ebx
  lea    -0x1(%rbx),%ebp
  cmp    $0x1,%ebx
  jne    L775
L1466:
  mov    0x8(%rsp),%r13
  add    $0x1,%r13
L1368:
  add    0x18(%rsp),%r13
  add    %r13,0x20(%rsp)
  subl   $0x3,0x14(%rsp)
  jne    L1413
L547:
  mov    0x20(%rsp),%rax
  add    $0x1,%rax
L521:
  add    0x28(%rsp),%rax
  add    %rax,0x30(%rsp)
  subl   $0x3,0x40(%rsp)
  jne    L1058
L725:
  mov    $0x1,%eax
L417:
  mov    0x48(%rsp),%rdx
  add    0x38(%rsp),%rdx
  add    %rdx,%rax
  add    0x30(%rsp),%rax
  subl   $0x3,0x44(%rsp)
  mov    %rax,0x38(%rsp)
  jne    L841
L1384:
  add    $0x1,%rax
L207:
  add    $0x58,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax,%rax,1)
L380:
  mov    $0x1,%r13d
  jmp    L682
  nopl   0x0(%rax,%rax,1)
L306:
  add    $0x1,%rbp
  jmp    L612
  nopl   0x0(%rax)
L889:
  mov    $0x1,%r12d
  lea    (%r12,%r15,1),%r13
  mov    %ebx,%r12d
  sub    $0x2,%r12d
  jne    L1074
L756:
  mov    0x8(%rsp),%rax
  lea    0x1(%r13,%rax,1),%r13
  jmp    L1347
  cs nopw 0x0(%rax,%rax,1)
L490:
  add    $0x1,%rbx
  jmp    L17
  nopl   0x0(%rax)
L717:
  mov    $0x1,%r14d
  add    %r15,%r14
  mov    %r12d,%r15d
  sub    $0x2,%r15d
  jne    L1405
L1370:
  lea    0x1(%r14),%rbp
  jmp    L388
  nop
L258:
  add    $0x1,%rbp
  jmp    L4
  nopl   0x0(%rax)
L161:
  mov    $0x1,%ebp
  mov    %r12d,%r14d
  add    %r15,%rbp
  sub    $0x2,%r14d
  jne    L1134
L1069:
  mov    0x8(%rsp),%rax
  lea    0x1(%rbp,%rax,1),%r13
  jmp    L740
  nopl   0x0(%rax)
L1320:
  add    $0x1,%rbx
  jmp    L645
  nopl   0x0(%rax)
L1160:
  mov    $0x1,%r12d
  lea    (%r12,%r15,1),%r14
  mov    %ebx,%r12d
  sub    $0x2,%r12d
  jne    L1315
L828:
  lea    0x1(%r14),%rbx
  jmp    L448
  nopl   0x0(%rax,%rax,1)
L953:
  add    $0x1,%rbx
  jmp    L1117
  nopl   0x0(%rax)
L1349:
  mov    $0x1,%ebp
  mov    %r12d,%r14d
  add    %r15,%rbp
  sub    $0x2,%r14d
  jne    L222
L346:
  lea    0x1(%rbp),%rbp
  jmp    L973
  xchg   %ax,%ax
L626:
  add    $0x1,%rbx
  jmp    L1125
  nopl   0x0(%rax)
L418:
  mov    $0x1,%r12d
  mov    %ebx,%r15d
  add    %r12,%r13
  sub    $0x2,%r15d
  jne    L1161
L985:
  mov    0x8(%rsp),%rax
  lea    0x1(%rax,%r13,1),%r13
  jmp    L1368
  nopl   (%rax)
L72:
  add    $0x1,%rbp
  jmp    L457
L44:
  add    $0x1,%r12
  add    %rbx,%r12
  add    %r12,0x18(%rsp)
  subl   $0x3,0x14(%rsp)
  jne    L888
  jmp    L201
L101:
  mov    0x38(%rsp),%rax
  jmp    L1384
L571:
  add    %rax,%rbp
  jmp    L457
L766:
  add    %rax,%rbx
  jmp    L1125
L998:
  add    %rax,%r12
  add    %rbx,%r12
  add    %r12,0x18(%rsp)
  subl   $0x3,0x14(%rsp)
  jne    L888
  jmp    L201
L553:
  add    %rax,%rbx
  jmp    L1117
L533:
  add    %rax,%rbx
  jmp    L645
L150:
  add    %rax,%rbp
  jmp    L4
L814:
  add    %rax,%rbx
  jmp    L17
L760:
  add    %rax,%rbp
  jmp    L612
L1266:
  add    $0x58,%rsp
  mov    $0x1,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L1003:
  mov    0x18(%rsp),%rax
  mov    0x20(%rsp),%rsi
  lea    0x1(%rax,%rsi,1),%rax
  jmp    L47
L573:
  mov    0x18(%rsp),%rax
  add    $0x1,%rax
  jmp    L700
L669:
  mov    0x28(%rsp),%rax
  add    $0x1,%rax
  jmp    L821
L1441:
  mov    0x20(%rsp),%rax
  mov    0x18(%rsp),%rdx
  lea    0x1(%rax,%rdx,1),%rax
  jmp    L521
L896:
  add    $0x1,%rbx
  jmp    L225
L358:
  mov    0x8(%rsp),%r13
  add    $0x1,%r13
  jmp    L1192
L834:
  mov    0x28(%rsp),%rax
  add    $0x1,%rax
  jmp    L417
L1013:
  mov    0x48(%rsp),%rax
  mov    0x38(%rsp),%rsi
  lea    0x1(%rax,%rsi,1),%rax
  jmp    L207
```

assistant: ```c
unsigned long long possibilities_naive(unsigned n) {
  if (n == 0)
    return 1;
  unsigned long long res = possibilities_naive(n - 1);
  if (n > 1)
    res += possibilities_naive(n - 2);
  if (n > 2)
    res += possibilities_naive(n - 3);
  return res;
}
```