user: 请从给定的汇编指令推导出C源代码:

```asm
<possible_trees_aux>:
  endbr64
  push   %r15
  mov    $0x1,%eax
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0xa8,%rsp
  mov    %rdi,0x48(%rsp)
  mov    %rsi,0x50(%rsp)
  cmp    %rsi,%rdi
  jae    L1120
  lea    0x1(%rdi),%rcx
  mov    %rdi,%rax
  mov    %rcx,0x68(%rsp)
  cmp    %rcx,%rsi
  jbe    L520
  add    $0x2,%rax
  mov    %rcx,0x8(%rsp)
  mov    %rax,0x78(%rsp)
  mov    0x78(%rsp),%rax
  movl   $0x0,0x9c(%rsp)
  movl   $0x1,0x98(%rsp)
  cmp    %rax,0x50(%rsp)
  jbe    L376
L1027:
  mov    0x8(%rsp),%rdx
  mov    %rax,%r15
  movl   $0x0,0x8c(%rsp)
  movl   $0x1,0x60(%rsp)
  lea    0x2(%rdx),%rcx
  lea    0x1(%rdx),%rax
  mov    %rcx,0x90(%rsp)
  mov    %rcx,0x40(%rsp)
  mov    %rax,0x80(%rsp)
L208:
  mov    0x40(%rsp),%rax
  cmp    %rax,0x50(%rsp)
  jbe    L693
  mov    %rax,0x10(%rsp)
  lea    0x1(%r15),%rax
  movl   $0x0,0x38(%rsp)
  movl   $0x1,0x2c(%rsp)
  mov    %rax,0x70(%rsp)
L13:
  mov    0x10(%rsp),%rax
  lea    0x1(%rax),%r13
  mov    0x50(%rsp),%rax
  mov    %r13,0x30(%rsp)
  cmp    %r13,%rax
  jbe    L1145
  movl   $0x0,0x20(%rsp)
  movl   $0x1,0x18(%rsp)
  mov    %r15,0x58(%rsp)
  mov    %rax,%r15
L1143:
  movl   $0x0,0x28(%rsp)
  mov    %r13,%r12
  mov    $0x1,%ebp
L1097:
  add    $0x1,%r12
  mov    %r15,%rsi
  mov    %r12,%rdi
  call   <possible_trees_aux>
  imul   %ebp,%eax
  add    %eax,0x28(%rsp)
  cmp    %r12,%r15
  jbe    L706
  cmp    %r12,%r13
  jae    L514
  mov    %r13,%r14
  xor    %ebp,%ebp
L294:
  mov    %r14,%rsi
  mov    %r13,%rdi
  add    $0x1,%r14
  call   <possible_trees_aux>
  mov    %r12,%rsi
  mov    %r14,%rdi
  mov    %eax,%ebx
  call   <possible_trees_aux>
  imul   %eax,%ebx
  add    %ebx,%ebp
  cmp    %r14,%r12
  ja     L294
  jmp    L1097
L520:
  movl   $0x0,0x9c(%rsp)
  movl   $0x1,0x98(%rsp)
L291:
  mov    0x9c(%rsp),%eax
  add    0x98(%rsp),%eax
L1120:
  add    $0xa8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopw   0x0(%rax,%rax,1)
L706:
  mov    0x28(%rsp),%r14d
  imul   0x18(%rsp),%r14d
  add    %r14d,0x20(%rsp)
  mov    0x10(%rsp),%r14
  cmp    %r14,%r13
  jbe    L732
  mov    %r14,%rbp
  xor    %r12d,%r12d
L998:
  mov    %rbp,%rsi
  mov    %r14,%rdi
  add    $0x1,%rbp
  call   <possible_trees_aux>
  mov    %r13,%rsi
  mov    %rbp,%rdi
  mov    %eax,%ebx
  call   <possible_trees_aux>
  imul   %eax,%ebx
  add    %ebx,%r12d
  cmp    %rbp,%r13
  jne    L998
  mov    %r12d,0x18(%rsp)
L943:
  add    $0x1,%r13
  cmp    %r13,%r15
  ja     L1143
  mov    0x20(%rsp),%eax
  mov    0x58(%rsp),%r15
  add    0x18(%rsp),%eax
  imul   0x2c(%rsp),%eax
  add    %eax,0x38(%rsp)
  cmp    %r15,0x10(%rsp)
  jbe    L849
L988:
  mov    0x40(%rsp),%rcx
  cmp    %rcx,0x10(%rsp)
  jbe    L920
  movl   $0x0,0x20(%rsp)
  mov    0x70(%rsp),%r13
  mov    $0x1,%r14d
L243:
  xor    %r12d,%r12d
  mov    %r14d,0x28(%rsp)
  mov    %r13,%rbp
  mov    %r13,%r14
  mov    %r12d,%r13d
  mov    0x10(%rsp),%r12
L385:
  mov    %rbp,%rsi
  mov    %r14,%rdi
  add    $0x1,%rbp
  call   <possible_trees_aux>
  mov    %r12,%rsi
  mov    %rbp,%rdi
  mov    %eax,%ebx
  call   <possible_trees_aux>
  imul   %eax,%ebx
  add    %ebx,%r13d
  cmp    %r12,%rbp
  jb     L385
  mov    %r13d,%r12d
  mov    %r14,%r13
  mov    0x28(%rsp),%r14d
  imul   %r14d,%r12d
  add    %r12d,0x20(%rsp)
  cmp    %r15,%r13
  jbe    L23
  mov    0x40(%rsp),%rax
  cmp    %rax,%r13
  jbe    L1049
  movl   $0x0,0x28(%rsp)
  mov    %rax,%r12
  mov    $0x1,%ebx
L120:
  xor    %edx,%edx
  mov    %ebx,0x18(%rsp)
  mov    %r12,%r14
  mov    %r12,%rbx
  mov    %edx,%r12d
L168:
  mov    %r14,%rsi
  mov    %rbx,%rdi
  add    $0x1,%r14
  call   <possible_trees_aux>
  mov    %r13,%rsi
  mov    %r14,%rdi
  mov    %eax,%ebp
  call   <possible_trees_aux>
  imul   %eax,%ebp
  add    %ebp,%r12d
  cmp    %r14,%r13
  ja     L168
  mov    %r12d,%edx
  mov    %rbx,%r12
  mov    0x18(%rsp),%ebx
  imul   %ebx,%edx
  add    %edx,0x28(%rsp)
  cmp    %r15,%r12
  jbe    L418
  mov    %r15,%r14
  xor    %ebx,%ebx
L46:
  mov    %r14,%rsi
  mov    %r15,%rdi
  add    $0x1,%r14
  call   <possible_trees_aux>
  mov    %r12,%rsi
  mov    %r14,%rdi
  mov    %eax,%ebp
  call   <possible_trees_aux>
  imul   %eax,%ebp
  add    %ebp,%ebx
  cmp    %r14,%r12
  jne    L46
L29:
  add    $0x1,%r12
  cmp    %r12,%r13
  ja     L120
L1125:
  mov    0x28(%rsp),%r14d
  add    %ebx,%r14d
L163:
  add    $0x1,%r13
  cmp    %r13,0x10(%rsp)
  ja     L243
L612:
  add    0x20(%rsp),%r14d
  mov    0x30(%rsp),%rcx
  mov    %r14d,0x2c(%rsp)
  cmp    %rcx,0x50(%rsp)
  jbe    L840
L539:
  mov    0x30(%rsp),%rax
  mov    %rax,0x10(%rsp)
  jmp    L13
  nopl   (%rax)
L418:
  mov    $0x1,%ebx
  jmp    L29
  nop
L514:
  mov    $0x1,%ebp
  jmp    L1097
  nopw   0x0(%rax,%rax,1)
L1049:
  movl   $0x0,0x28(%rsp)
  mov    $0x1,%ebx
  jmp    L1125
L693:
  lea    0x1(%r15),%rax
  movl   $0x0,0x38(%rsp)
  movl   $0x1,0x2c(%rsp)
  mov    %rax,0x70(%rsp)
L840:
  mov    0x38(%rsp),%eax
  add    0x2c(%rsp),%eax
  imul   0x60(%rsp),%eax
  add    %eax,0x8c(%rsp)
  cmp    0x8(%rsp),%r15
  jbe    L126
  mov    0x80(%rsp),%rax
  cmp    %rax,%r15
  jbe    L614
  mov    0x90(%rsp),%rdx
  movl   $0x1,0x58(%rsp)
  mov    %rax,%r14
  movl   $0x0,0x88(%rsp)
  mov    %rdx,0x30(%rsp)
  mov    %r15,0x60(%rsp)
L1102:
  mov    0x30(%rsp),%rax
  mov    0x60(%rsp),%r15
  cmp    %r15,%rax
  jae    L960
  mov    %rax,0x20(%rsp)
  movl   $0x1,0x2c(%rsp)
  movl   $0x0,0x38(%rsp)
  mov    %r14,0x10(%rsp)
L891:
  mov    0x20(%rsp),%rax
  mov    %rax,%r13
  add    $0x1,%rax
  mov    %rax,0x20(%rsp)
  cmp    %r15,%rax
  jae    L790
  movl   $0x0,0x28(%rsp)
  mov    %rax,%r12
  mov    $0x1,%ebx
L278:
  xor    %edx,%edx
  mov    %ebx,0x18(%rsp)
  mov    %r12,%r14
  mov    %r12,%rbx
  mov    %edx,%r12d
L744:
  mov    %r14,%rsi
  mov    %rbx,%rdi
  add    $0x1,%r14
  call   <possible_trees_aux>
  mov    %r15,%rsi
  mov    %r14,%rdi
  mov    %eax,%ebp
  call   <possible_trees_aux>
  imul   %eax,%ebp
  add    %ebp,%r12d
  cmp    %r15,%r14
  jb     L744
  mov    %r12d,%edx
  mov    %rbx,%r12
  mov    0x18(%rsp),%ebx
  imul   %ebx,%edx
  add    %edx,0x28(%rsp)
  cmp    %r13,%r12
  jbe    L605
  mov    %r13,%r14
  xor    %ebx,%ebx
L581:
  mov    %r14,%rsi
  mov    %r13,%rdi
  add    $0x1,%r14
  call   <possible_trees_aux>
  mov    %r12,%rsi
  mov    %r14,%rdi
  mov    %eax,%ebp
  call   <possible_trees_aux>
  imul   %eax,%ebp
  add    %ebp,%ebx
  cmp    %r12,%r14
  jne    L581
L1020:
  add    $0x1,%r12
  cmp    %r15,%r12
  jb     L278
L588:
  mov    0x28(%rsp),%eax
  add    %ebx,%eax
  imul   0x2c(%rsp),%eax
  add    %eax,0x38(%rsp)
  cmp    0x10(%rsp),%r13
  jbe    L169
  cmp    %r13,0x30(%rsp)
  jae    L203
  mov    %r15,0x18(%rsp)
  mov    0x30(%rsp),%r12
  mov    $0x1,%ebx
  movl   $0x0,0x28(%rsp)
L388:
  mov    %r12,%r14
  xor    %r15d,%r15d
L417:
  mov    %r14,%rsi
  mov    %r12,%rdi
  add    $0x1,%r14
  call   <possible_trees_aux>
  mov    %r13,%rsi
  mov    %r14,%rdi
  mov    %eax,%ebp
  call   <possible_trees_aux>
  imul   %eax,%ebp
  add    %ebp,%r15d
  cmp    %r13,%r14
  jb     L417
  mov    0x10(%rsp),%rax
  mov    %r15d,%ecx
  imul   %ebx,%ecx
  add    %ecx,0x28(%rsp)
  cmp    %rax,%r12
  jbe    L796
  mov    %rax,%r15
  xor    %ebx,%ebx
  mov    %rax,%r14
L902:
  mov    %r15,%rsi
  mov    %r14,%rdi
  add    $0x1,%r15
  call   <possible_trees_aux>
  mov    %r12,%rsi
  mov    %r15,%rdi
  mov    %eax,%ebp
  call   <possible_trees_aux>
  imul   %eax,%ebp
  add    %ebp,%ebx
  cmp    %r12,%r15
  jne    L902
L821:
  add    $0x1,%r12
  cmp    %r13,%r12
  jb     L388
  mov    0x18(%rsp),%r15
L427:
  add    0x28(%rsp),%ebx
  mov    %ebx,0x2c(%rsp)
L611:
  cmp    %r15,0x20(%rsp)
  jb     L891
  mov    0x10(%rsp),%r14
L100:
  mov    0x2c(%rsp),%eax
  add    0x38(%rsp),%eax
  imul   0x58(%rsp),%eax
  add    %eax,0x88(%rsp)
  cmp    0x8(%rsp),%r14
  jbe    L696
  cmp    0x78(%rsp),%r14
  jbe    L527
  movl   $0x0,0x28(%rsp)
  mov    0x80(%rsp),%r12
  mov    $0x1,%ebx
L316:
  mov    %r12,%r13
  xor    %r15d,%r15d
L927:
  mov    %r13,%rsi
  mov    %r12,%rdi
  add    $0x1,%r13
  call   <possible_trees_aux>
  mov    %r14,%rsi
  mov    %r13,%rdi
  mov    %eax,%ebp
  call   <possible_trees_aux>
  imul   %eax,%ebp
  add    %ebp,%r15d
  cmp    %r14,%r13
  jb     L927
  mov    0x8(%rsp),%rax
  mov    %r15d,%ecx
  imul   %ebx,%ecx
  add    %ecx,0x28(%rsp)
  cmp    %r12,%rax
  jae    L166
  mov    %rax,%r15
  xor    %ebx,%ebx
  mov    %rax,%r13
L518:
  mov    %r15,%rsi
  mov    %r13,%rdi
  add    $0x1,%r15
  call   <possible_trees_aux>
  mov    %r12,%rsi
  mov    %r15,%rdi
  mov    %eax,%ebp
  call   <possible_trees_aux>
  imul   %eax,%ebp
  add    %ebp,%ebx
  cmp    %r12,%r15
  jne    L518
L193:
  add    $0x1,%r12
  cmp    %r14,%r12
  jb     L316
L966:
  add    0x28(%rsp),%ebx
  mov    %ebx,0x58(%rsp)
L1056:
  addq   $0x1,0x30(%rsp)
  add    $0x1,%r14
  cmp    0x60(%rsp),%r14
  jb     L1102
L383:
  mov    0x88(%rsp),%eax
  add    0x58(%rsp),%eax
  mov    %eax,0x60(%rsp)
L188:
  addq   $0x1,0x40(%rsp)
  mov    0x70(%rsp),%r15
  cmp    %r15,0x50(%rsp)
  ja     L208
L359:
  mov    0x8c(%rsp),%eax
  add    0x60(%rsp),%eax
  imul   0x98(%rsp),%eax
  add    %eax,0x9c(%rsp)
  mov    0x8(%rsp),%rax
  cmp    %rax,0x48(%rsp)
  jae    L1116
  mov    0x68(%rsp),%rdx
  cmp    %rdx,%rax
  jbe    L819
  mov    %rdx,%rax
  mov    %rdx,0x18(%rsp)
  lea    0x1(%rax),%r15
  movl   $0x0,0x60(%rsp)
  movl   $0x1,0x58(%rsp)
  mov    %r15,0x38(%rsp)
  cmp    %r15,0x8(%rsp)
  jbe    L410
L1042:
  add    $0x2,%rax
  movl   $0x0,0x40(%rsp)
  mov    %rax,0x20(%rsp)
  movl   $0x1,0x30(%rsp)
L11:
  mov    0x20(%rsp),%rax
  mov    0x8(%rsp),%rdx
  cmp    %rdx,%rax
  jae    L1177
  movl   $0x0,0x2c(%rsp)
  mov    %rax,%r13
  mov    $0x1,%r14d
L1065:
  xor    %r12d,%r12d
  mov    %r14d,0x28(%rsp)
  mov    %r13,%rbp
  mov    %r13,%r14
  mov    %r12d,%r13d
  mov    0x8(%rsp),%r12
L653:
  mov    %rbp,%rsi
  mov    %r14,%rdi
  add    $0x1,%rbp
  call   <possible_trees_aux>
  mov    %r12,%rsi
  mov    %rbp,%rdi
  mov    %eax,%ebx
  call   <possible_trees_aux>
  imul   %eax,%ebx
  add    %ebx,%r13d
  cmp    %r12,%rbp
  jb     L653
  mov    %r13d,%r12d
  mov    %r14,%r13
  mov    0x28(%rsp),%r14d
  imul   %r14d,%r12d
  add    %r12d,0x2c(%rsp)
  cmp    %r15,%r13
  jbe    L969
  mov    0x20(%rsp),%rax
  cmp    %rax,%r13
  jbe    L915
  movl   $0x0,0x28(%rsp)
  mov    %rax,%r12
  mov    $0x1,%ebx
L547:
  xor    %edx,%edx
  mov    %ebx,0x10(%rsp)
  mov    %r12,%r14
  mov    %r12,%rbx
  mov    %edx,%r12d
L213:
  mov    %r14,%rsi
  mov    %rbx,%rdi
  add    $0x1,%r14
  call   <possible_trees_aux>
  mov    %r13,%rsi
  mov    %r14,%rdi
  mov    %eax,%ebp
  call   <possible_trees_aux>
  imul   %eax,%ebp
  add    %ebp,%r12d
  cmp    %r13,%r14
  jb     L213
  mov    %r12d,%edx
  mov    %rbx,%r12
  mov    0x10(%rsp),%ebx
  imul   %ebx,%edx
  add    %edx,0x28(%rsp)
  cmp    %r15,%r12
  jbe    L1191
  mov    %r15,%r14
  xor    %ebx,%ebx
L1088:
  mov    %r14,%rsi
  mov    %r15,%rdi
  add    $0x1,%r14
  call   <possible_trees_aux>
  mov    %r12,%rsi
  mov    %r14,%rdi
  mov    %eax,%ebp
  call   <possible_trees_aux>
  imul   %eax,%ebp
  add    %ebp,%ebx
  cmp    %r12,%r14
  jne    L1088
L1156:
  add    $0x1,%r12
  cmp    %r12,%r13
  ja     L547
L307:
  mov    0x28(%rsp),%r14d
  add    %ebx,%r14d
L431:
  add    $0x1,%r13
  cmp    %r13,0x8(%rsp)
  ja     L1065
L398:
  mov    0x2c(%rsp),%eax
  add    %r14d,%eax
  imul   0x30(%rsp),%eax
  add    %eax,0x40(%rsp)
  cmp    0x18(%rsp),%r15
  jbe    L1200
  mov    0x38(%rsp),%rax
  cmp    %rax,%r15
  jbe    L887
  movl   $0x0,0x28(%rsp)
  mov    %rax,%r12
  mov    $0x1,%ebx
  nopw   0x0(%rax,%rax,1)
L351:
  mov    %r12,%r13
  xor    %r14d,%r14d
L912:
  mov    %r13,%rsi
  mov    %r12,%rdi
  add    $0x1,%r13
  call   <possible_trees_aux>
  mov    %r15,%rsi
  mov    %r13,%rdi
  mov    %eax,%ebp
  call   <possible_trees_aux>
  imul   %eax,%ebp
  add    %ebp,%r14d
  cmp    %r15,%r13
  jb     L912
  mov    0x18(%rsp),%r13
  mov    %r14d,%ecx
  imul   %ebx,%ecx
  add    %ecx,0x28(%rsp)
  cmp    %r12,%r13
  jae    L389
  mov    %r13,%r14
  xor    %ebx,%ebx
L571:
  mov    %r14,%rsi
  mov    %r13,%rdi
  add    $0x1,%r14
  call   <possible_trees_aux>
  mov    %r12,%rsi
  mov    %r14,%rdi
  mov    %eax,%ebp
  call   <possible_trees_aux>
  imul   %eax,%ebp
  add    %ebp,%ebx
  cmp    %r12,%r14
  jne    L571
L91:
  add    $0x1,%r12
  cmp    %r12,%r15
  ja     L351
L964:
  add    0x28(%rsp),%ebx
  mov    %ebx,0x30(%rsp)
L293:
  addq   $0x1,0x20(%rsp)
  add    $0x1,%r15
  cmp    0x8(%rsp),%r15
  jb     L11
  mov    0x30(%rsp),%eax
  mov    0x18(%rsp),%rdx
  add    0x40(%rsp),%eax
  imul   0x58(%rsp),%eax
  add    %eax,0x60(%rsp)
  cmp    %rdx,0x48(%rsp)
  jae    L379
L1052:
  mov    0x18(%rsp),%r14
  mov    0x68(%rsp),%r13
  movl   $0x0,0x2c(%rsp)
  movl   $0x1,0x20(%rsp)
  cmp    %r13,%r14
  jbe    L95
  lea    0x1(%r13),%r12
  mov    %r12,0x18(%rsp)
  cmp    %r12,%r14
  jbe    L343
  nopl   0x0(%rax)
L135:
  movl   $0x0,0x10(%rsp)
  mov    $0x1,%ebx
L533:
  xor    %edx,%edx
  mov    %ebx,0x28(%rsp)
  mov    %r12,%r15
  mov    %r12,%rbx
  mov    %edx,%r12d
L494:
  mov    %r15,%rsi
  mov    %rbx,%rdi
  add    $0x1,%r15
  call   <possible_trees_aux>
  mov    %r14,%rsi
  mov    %r15,%rdi
  mov    %eax,%ebp
  call   <possible_trees_aux>
  imul   %eax,%ebp
  add    %ebp,%r12d
  cmp    %r14,%r15
  jb     L494
  mov    %r12d,%edx
  mov    %rbx,%r12
  mov    0x28(%rsp),%ebx
  imul   %ebx,%edx
  add    %edx,0x10(%rsp)
  cmp    %r12,%r13
  jae    L21
  mov    %r13,%r15
  xor    %ebx,%ebx
L759:
  mov    %r15,%rsi
  mov    %r13,%rdi
  add    $0x1,%r15
  call   <possible_trees_aux>
  mov    %r12,%rsi
  mov    %r15,%rdi
  mov    %eax,%ebp
  call   <possible_trees_aux>
  imul   %eax,%ebp
  add    %ebp,%ebx
  cmp    %r12,%r15
  jne    L759
L70:
  add    $0x1,%r12
  cmp    %r12,%r14
  ja     L533
  add    0x10(%rsp),%ebx
  imul   0x20(%rsp),%ebx
  add    %ebx,0x2c(%rsp)
  cmp    %r13,0x48(%rsp)
  jae    L933
L121:
  cmp    0x68(%rsp),%r13
  jbe    L782
  mov    %r14,0x10(%rsp)
  mov    0x68(%rsp),%r12
  mov    $0x1,%ebx
  movl   $0x0,0x28(%rsp)
  nopw   0x0(%rax,%rax,1)
L638:
  mov    %r12,%r15
  xor    %r14d,%r14d
L8:
  mov    %r15,%rsi
  mov    %r12,%rdi
  add    $0x1,%r15
  call   <possible_trees_aux>
  mov    %r13,%rsi
  mov    %r15,%rdi
  mov    %eax,%ebp
  call   <possible_trees_aux>
  imul   %eax,%ebp
  add    %ebp,%r14d
  cmp    %r13,%r15
  jb     L8
  mov    0x48(%rsp),%r15
  mov    %r14d,%ecx
  imul   %ebx,%ecx
  add    %ecx,0x28(%rsp)
  cmp    %r12,%r15
  jae    L541
  mov    %r15,%r14
  xor    %ebx,%ebx
L1047:
  mov    %r14,%rsi
  mov    %r15,%rdi
  add    $0x1,%r14
  call   <possible_trees_aux>
  mov    %r12,%rsi
  mov    %r14,%rdi
  mov    %eax,%ebp
  call   <possible_trees_aux>
  imul   %eax,%ebp
  add    %ebp,%ebx
  cmp    %r12,%r14
  jb     L1047
L850:
  add    $0x1,%r12
  cmp    %r12,%r13
  ja     L638
  mov    0x10(%rsp),%r14
L711:
  add    0x28(%rsp),%ebx
  mov    %ebx,0x20(%rsp)
  cmp    0x18(%rsp),%r14
  jbe    L95
L516:
  mov    0x18(%rsp),%r13
  lea    0x1(%r13),%r12
  mov    %r12,0x18(%rsp)
  cmp    %r12,%r14
  ja     L135
L343:
  mov    0x20(%rsp),%edx
  add    %edx,0x2c(%rsp)
  cmp    %r13,0x48(%rsp)
  jb     L121
  movl   $0x1,0x20(%rsp)
  nop
L95:
  mov    0x2c(%rsp),%eax
  add    0x20(%rsp),%eax
  mov    %eax,0x58(%rsp)
  mov    0x38(%rsp),%rdx
  cmp    %rdx,0x8(%rsp)
  jbe    L907
L538:
  mov    0x38(%rsp),%rax
  lea    0x1(%rax),%r15
  mov    %rax,0x18(%rsp)
  mov    %r15,0x38(%rsp)
  cmp    %r15,0x8(%rsp)
  ja     L1042
L410:
  mov    0x58(%rsp),%ecx
  mov    0x18(%rsp),%rdx
  add    %ecx,0x60(%rsp)
  cmp    %rdx,0x48(%rsp)
  jb     L1052
  movl   $0x1,0x58(%rsp)
L907:
  mov    0x60(%rsp),%eax
  add    0x58(%rsp),%eax
  mov    %eax,0x98(%rsp)
L90:
  mov    0x80(%rsp),%rax
  mov    0x50(%rsp),%rdx
  addq   $0x1,0x78(%rsp)
  mov    %rax,0x8(%rsp)
  cmp    %rdx,%rax
  jae    L291
  mov    0x78(%rsp),%rax
  cmp    %rax,0x50(%rsp)
  ja     L1027
L376:
  mov    0x8(%rsp),%rax
  movl   $0x1,0x60(%rsp)
  movl   $0x0,0x8c(%rsp)
  add    $0x1,%rax
  mov    %rax,0x80(%rsp)
  jmp    L359
  nop
L1191:
  mov    $0x1,%ebx
  jmp    L1156
  nopw   0x0(%rax,%rax,1)
L796:
  mov    $0x1,%ebx
  jmp    L821
  nopw   0x0(%rax,%rax,1)
L605:
  mov    $0x1,%ebx
  jmp    L1020
  nopw   0x0(%rax,%rax,1)
L790:
  movl   $0x0,0x28(%rsp)
  mov    $0x1,%ebx
  jmp    L588
  nopw   0x0(%rax,%rax,1)
L915:
  movl   $0x0,0x28(%rsp)
  mov    $0x1,%ebx
  jmp    L307
  nopw   0x0(%rax,%rax,1)
L203:
  movl   $0x0,0x28(%rsp)
  mov    $0x1,%ebx
  jmp    L427
  nopw   0x0(%rax,%rax,1)
L21:
  mov    $0x1,%ebx
  jmp    L70
  nopw   0x0(%rax,%rax,1)
L23:
  mov    $0x1,%r14d
  jmp    L163
  nopl   0x0(%rax,%rax,1)
L732:
  movl   $0x1,0x18(%rsp)
  jmp    L943
  nopl   (%rax)
L169:
  movl   $0x1,0x2c(%rsp)
  jmp    L611
  nopl   (%rax)
L389:
  mov    $0x1,%ebx
  jmp    L91
  nopw   0x0(%rax,%rax,1)
L541:
  mov    $0x1,%ebx
  jmp    L850
  nopw   0x0(%rax,%rax,1)
L969:
  mov    $0x1,%r14d
  jmp    L431
  nopl   0x0(%rax,%rax,1)
L166:
  mov    $0x1,%ebx
  jmp    L193
  nopw   0x0(%rax,%rax,1)
L527:
  movl   $0x0,0x28(%rsp)
  mov    $0x1,%ebx
  jmp    L966
  nopw   0x0(%rax,%rax,1)
L920:
  movl   $0x0,0x20(%rsp)
  mov    $0x1,%r14d
  jmp    L612
  nopl   0x0(%rax,%rax,1)
L1177:
  movl   $0x0,0x2c(%rsp)
  mov    $0x1,%r14d
  jmp    L398
  nopl   0x0(%rax,%rax,1)
L960:
  movl   $0x1,0x2c(%rsp)
  movl   $0x0,0x38(%rsp)
  jmp    L100
  nopl   (%rax)
L1145:
  mov    0x2c(%rsp),%ecx
  add    %ecx,0x38(%rsp)
  cmp    %r15,0x10(%rsp)
  ja     L988
  movl   $0x1,0x2c(%rsp)
  jmp    L840
L887:
  movl   $0x0,0x28(%rsp)
  mov    $0x1,%ebx
  jmp    L964
L782:
  movl   $0x0,0x28(%rsp)
  mov    $0x1,%ebx
  jmp    L711
L696:
  movl   $0x1,0x58(%rsp)
  jmp    L1056
L849:
  movl   $0x1,0x2c(%rsp)
  jmp    L539
L614:
  movl   $0x0,0x88(%rsp)
  movl   $0x1,0x58(%rsp)
  jmp    L383
L1200:
  movl   $0x1,0x30(%rsp)
  jmp    L293
L126:
  movl   $0x1,0x60(%rsp)
  jmp    L188
L819:
  movl   $0x0,0x60(%rsp)
  movl   $0x1,0x58(%rsp)
  jmp    L907
L933:
  movl   $0x1,0x20(%rsp)
  jmp    L516
L379:
  movl   $0x1,0x58(%rsp)
  jmp    L538
L1116:
  movl   $0x1,0x98(%rsp)
  jmp    L90
```

assistant: ```c
unsigned possible_trees_aux(size_t begin, size_t end) {
  if (begin >= end) {
    return 1;
  }
  unsigned res = 0;
  size_t i;
  for (i = begin; i < end; i++) {
    res += possible_trees_aux(begin, i) * possible_trees_aux(i + 1, end);
  }
  return res;
}
```