user: 请从给定的汇编指令推导出C源代码:

```asm
<rludecomp>:
  endbr64
  push   %r15
  push   %r14
  mov    %edx,%r14d
  push   %r13
  mov    %rdi,%r13
  push   %r12
  push   %rbp
  mov    %esi,%ebp
  push   %rbx
  sub    $0xb8,%rsp
  mov    %rcx,0x58(%rsp)
  test   %esi,%esi
  jle    L430
  lea    -0x1(%rsi),%eax
  cmp    $0x2,%eax
  jbe    L183
  mov    %esi,%edx
  movdqa D36(%rip),%xmm0
  movdqa D19(%rip),%xmm2
  mov    %rcx,%rax
  shr    $0x2,%edx
  sub    $0x1,%edx
  shl    $0x4,%rdx
  lea    0x10(%rcx,%rdx,1),%rdx
  nopw   0x0(%rax,%rax,1)
L623:
  movdqa %xmm0,%xmm1
  add    $0x10,%rax
  paddd  %xmm2,%xmm0
  movups %xmm1,-0x10(%rax)
  cmp    %rdx,%rax
  jne    L623
  mov    %ebp,%eax
  and    $0xfffffffc,%eax
  test   $0x3,%bpl
  je     L430
L607:
  mov    0x58(%rsp),%rbx
  movslq %eax,%rdx
  lea    0x0(,%rdx,4),%rcx
  mov    %eax,(%rbx,%rdx,4)
  lea    0x1(%rax),%edx
  cmp    %edx,%ebp
  jle    L430
  add    $0x2,%eax
  mov    %edx,0x4(%rbx,%rcx,1)
  cmp    %ebp,%eax
  jge    L430
  mov    %eax,0x8(%rbx,%rcx,1)
L430:
  cmp    %r14d,%ebp
  jle    L442
  test   %r14d,%r14d
  jle    L450
  lea    -0x2(%r14),%eax
  mov    %r14d,%edx
  lea    0x8(%r13),%r9
  mov    %r14d,%r10d
  mov    %eax,0x50(%rsp)
  movslq %r14d,%rax
  shr    %edx
  xor    %r12d,%r12d
  lea    0x8(,%rax,8),%rbx
  mov    %rax,0x18(%rsp)
  sub    $0x1,%edx
  pxor   %xmm4,%xmm4
  lea    0x0(,%rax,8),%r11
  lea    -0x1(%r14),%eax
  mov    %rbx,0x68(%rsp)
  add    $0x1,%rdx
  lea    0x2(%rax),%rbx
  mov    %eax,0x84(%rsp)
  lea    0x8(%r13,%rax,8),%rax
  shl    $0x4,%rdx
  mov    %rax,0xa8(%rsp)
  mov    $0x8,%eax
  movq   D32(%rip),%xmm3
  sub    %r13,%rax
  mov    %rbx,0x60(%rsp)
  mov    %r14d,%ebx
  mov    %rax,0xa0(%rsp)
  lea    (%r14,%r14,1),%eax
  and    $0xfffffffe,%ebx
  mov    %rdx,0x98(%rsp)
  movq   $0x0,0x40(%rsp)
  movq   $0x0,0x10(%rsp)
  mov    %eax,0x80(%rsp)
  mov    %ebx,0x90(%rsp)
  mov    %rbx,0x30(%rsp)
  mov    $0x1,%ebx
  nopl   0x0(%rax,%rax,1)
L216:
  movsd  -0x8(%r9),%xmm6
  mov    %r10d,%edi
  mov    %ebx,0x4c(%rsp)
  mov    %r12d,%eax
  sub    %r14d,%edi
  mov    %r12d,0x38(%rsp)
  mov    %ebx,%r15d
  movapd %xmm6,%xmm2
  mov    %edi,0xc(%rsp)
  mov    %ebx,%edi
  andpd  %xmm3,%xmm2
  cmp    %ebp,%ebx
  jge    L390
  movslq %r10d,%rdx
  add    %r12,%rdx
  lea    0x0(%r13,%rdx,8),%rcx
  mov    %ebx,%edx
  nopw   0x0(%rax,%rax,1)
L146:
  movsd  (%rcx),%xmm0
  movapd %xmm0,%xmm1
  andpd  %xmm3,%xmm1
  comisd %xmm2,%xmm1
  jbe    L34
  movapd %xmm0,%xmm2
  mov    %edx,%eax
L34:
  add    $0x1,%edx
  add    %r11,%rcx
  cmp    %edx,%ebp
  jne    L146
  cmp    %r12d,%eax
  jne    L247
L390:
  ucomisd %xmm4,%xmm6
  jp     L636
  lea    0x1(%r12),%rax
  mov    %rax,0x20(%rsp)
  jne    L636
L569:
  mov    0xc(%rsp),%r10d
  mov    0x18(%rsp),%rdi
  add    $0x1,%rbx
  subl   $0x1,0x50(%rsp)
  mov    0x20(%rsp),%r12
  add    %rdi,0x10(%rsp)
  add    0x80(%rsp),%r10d
  add    %r11,0x40(%rsp)
  add    0x68(%rsp),%r9
  cmp    %rbx,0x60(%rsp)
  jne    L216
L450:
  add    $0xb8,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L442:
  jge    L184
  cmp    $0x1,%ebp
  jle    L450
  lea    -0x2(%r14),%eax
  lea    0x8(%r13),%r11
  mov    %r14d,%r10d
  mov    %r14d,%r15d
  mov    %eax,0x4c(%rsp)
  movslq %r14d,%rax
  pxor   %xmm4,%xmm4
  movq   D32(%rip),%xmm3
  lea    0x8(,%rax,8),%rbx
  mov    %rax,0x50(%rsp)
  lea    0x0(,%rax,8),%r9
  mov    $0x1,%r12d
  lea    -0x2(%rbp),%eax
  mov    %rbx,0x60(%rsp)
  xor    %ebx,%ebx
  movq   $0x0,0x40(%rsp)
  add    $0x2,%rax
  mov    %rax,0x68(%rsp)
  mov    %r14d,%eax
  movq   $0x0,0x10(%rsp)
  shr    %eax
  sub    $0x1,%eax
  add    $0x1,%rax
  shl    $0x4,%rax
  mov    %rax,0x90(%rsp)
  mov    %r14d,%eax
  and    $0xfffffffe,%eax
  mov    %eax,0x88(%rsp)
  cltq
  mov    %rax,0x30(%rsp)
  lea    -0x1(%r14),%eax
  mov    %eax,0x84(%rsp)
  lea    0x8(%r13,%rax,8),%rax
  mov    %rax,0xa0(%rsp)
  mov    $0x8,%eax
  sub    %r13,%rax
  mov    %rax,0x98(%rsp)
  lea    (%r14,%r14,1),%eax
  mov    %eax,0x80(%rsp)
  cs nopw 0x0(%rax,%rax,1)
L140:
  movsd  -0x8(%r11),%xmm6
  mov    %r10d,%eax
  mov    %ebx,0x38(%rsp)
  movslq %ebx,%rcx
  sub    %r15d,%eax
  mov    %r12d,0x18(%rsp)
  mov    %r12d,%edi
  mov    %r12d,%r14d
  movapd %xmm6,%xmm2
  mov    %eax,0xc(%rsp)
  mov    %r12d,%r8d
  andpd  %xmm3,%xmm2
  cmp    %r12d,%ebp
  jle    L109
  movslq %r10d,%rax
  add    %rbx,%rax
  lea    0x0(%r13,%rax,8),%rdx
  mov    %r12d,%eax
L244:
  movsd  (%rdx),%xmm0
  movapd %xmm0,%xmm1
  andpd  %xmm3,%xmm1
  comisd %xmm2,%xmm1
  jbe    L358
  movapd %xmm0,%xmm2
  movslq %eax,%rcx
L358:
  add    $0x1,%eax
  add    %r9,%rdx
  cmp    %eax,%ebp
  jne    L244
  mov    %r14d,0x18(%rsp)
  cmp    %ebx,%ecx
  jne    L630
L109:
  ucomisd %xmm4,%xmm6
  jp     L511
  lea    0x1(%rbx),%rax
  mov    %rax,0x28(%rsp)
  jne    L511
L361:
  mov    0xc(%rsp),%r10d
  mov    0x50(%rsp),%rdi
  add    $0x1,%r12
  subl   $0x1,0x4c(%rsp)
  mov    0x28(%rsp),%rbx
  add    %rdi,0x10(%rsp)
  add    0x80(%rsp),%r10d
  add    %r9,0x40(%rsp)
  add    0x60(%rsp),%r11
  cmp    0x68(%rsp),%r12
  jne    L140
  jmp    L450
L184:
  jne    L450
  mov    0x58(%rsp),%rdx
  mov    %ebp,%esi
  mov    %r13,%rdi
  call   <pludecomp@plt>
  jmp    L450
  nopw   0x0(%rax,%rax,1)
L247:
  mov    0x58(%rsp),%r8
  movslq %eax,%rdx
  imul   %r14d,%eax
  lea    (%r8,%rdx,4),%rdx
  mov    (%r8,%r12,4),%esi
  mov    (%rdx),%ecx
  cltq
  mov    %esi,(%rdx)
  mov    %ecx,(%r8,%r12,4)
  mov    0x40(%rsp),%r8
  lea    0x0(,%rax,8),%rcx
  lea    0x10(%rcx),%rdx
  cmp    %r8,%rdx
  lea    0x10(%r8),%rdx
  setle  %sil
  cmp    %rdx,%rcx
  setge  %dl
  or     %sil,%dl
  je     L518
  cmpl   $0x1,0x84(%rsp)
  jbe    L518
  lea    0x0(%r13,%r8,1),%rsi
  mov    0x98(%rsp),%r8
  add    %r13,%rcx
  xor    %edx,%edx
  nopl   0x0(%rax)
L626:
  movupd (%rsi,%rdx,1),%xmm0
  movupd (%rcx,%rdx,1),%xmm7
  movups %xmm7,(%rsi,%rdx,1)
  movups %xmm0,(%rcx,%rdx,1)
  add    $0x10,%rdx
  cmp    %r8,%rdx
  jne    L626
  mov    0x90(%rsp),%esi
  cmp    %r14d,%esi
  je     L367
  add    0xc(%rsp),%esi
  movslq %esi,%rdx
  mov    0x30(%rsp),%rsi
  movsd  0x0(%r13,%rdx,8),%xmm0
  mov    0x10(%rsp),%rdx
  add    %rsi,%rax
  lea    0x0(%r13,%rax,8),%rax
  add    %rsi,%rdx
  movsd  (%rax),%xmm1
  movsd  %xmm1,0x0(%r13,%rdx,8)
  movsd  %xmm0,(%rax)
L367:
  movsd  -0x8(%r9),%xmm6
  jmp    L390
  nopl   0x0(%rax)
L636:
  cmp    %ebp,0x4c(%rsp)
  jge    L479
  mov    0x10(%rsp),%r8
  lea    0x1(%r12),%rsi
  movslq %r10d,%rax
  shl    $0x3,%r12
  mov    %rsi,0x20(%rsp)
  sub    %rax,%r8
  add    %rsi,%rax
  mov    %r14d,%esi
  mov    %rbx,0x88(%rsp)
  sub    %edi,%esi
  lea    0x0(,%rax,8),%rdx
  mov    %esi,%eax
  mov    %esi,0x48(%rsp)
  and    $0xfffffffe,%esi
  shr    %eax
  mov    %esi,0x3c(%rsp)
  add    %edi,%esi
  lea    -0x1(%rax),%ecx
  mov    0xc(%rsp),%eax
  add    $0x1,%rcx
  add    %esi,%eax
  shl    $0x4,%rcx
  cltq
  lea    0x0(%r13,%rax,8),%rdi
  lea    0x0(%r13,%rbx,8),%rax
  mov    0x4c(%rsp),%ebx
  sub    %r12,%rax
  mov    0x50(%rsp),%r12d
  mov    %rax,0x70(%rsp)
  mov    0xa0(%rsp),%rax
  add    %r9,%rax
  mov    %rax,0x28(%rsp)
  mov    0x70(%rsp),%rax
  sub    $0x8,%rax
  mov    %rax,0x70(%rsp)
  lea    0x8(%r13,%r12,8),%rax
  mov    %rax,0x78(%rsp)
  mov    %r14d,%eax
  sub    0x38(%rsp),%eax
  mov    %eax,0x38(%rsp)
  nopl   (%rax)
L37:
  movsd  -0x8(%r13,%rdx,1),%xmm0
  add    $0x1,%r15d
  divsd  %xmm6,%xmm0
  movsd  %xmm0,-0x8(%r13,%rdx,1)
  cmp    %r14d,%ebx
  jge    L262
  cmp    %rdx,0x28(%rsp)
  je     L340
  cmpl   $0x2,0x38(%rsp)
  je     L340
  movapd %xmm0,%xmm5
  lea    0x0(%r13,%rdx,1),%r12
  xor    %eax,%eax
  unpcklpd %xmm5,%xmm5
  nopl   0x0(%rax)
L201:
  movupd (%r9,%rax,1),%xmm2
  movupd (%r12,%rax,1),%xmm1
  mulpd  %xmm5,%xmm2
  subpd  %xmm2,%xmm1
  movups %xmm1,(%r12,%rax,1)
  add    $0x10,%rax
  cmp    %rax,%rcx
  jne    L201
  mov    0x48(%rsp),%r12d
  cmp    %r12d,0x3c(%rsp)
  je     L463
  mulsd  (%rdi),%xmm0
  lea    (%r10,%rsi,1),%eax
  cltq
  lea    0x0(%r13,%rax,8),%rax
  movsd  (%rax),%xmm1
  subsd  %xmm0,%xmm1
  movsd  %xmm1,(%rax)
L463:
  cmp    %r15d,%ebp
  jle    L475
L533:
  add    %r14d,%r10d
  sub    0x18(%rsp),%r8
  add    %r11,%rdx
  jmp    L37
  xchg   %ax,%ax
L340:
  mov    0x70(%rsp),%rax
  mov    0x78(%rsp),%r12
  add    %rdx,%rax
  add    %rdx,%r12
L98:
  movsd  (%rax,%r8,8),%xmm2
  movsd  (%rax),%xmm1
  add    $0x8,%rax
  mulsd  %xmm0,%xmm2
  subsd  %xmm2,%xmm1
  movsd  %xmm1,-0x8(%rax)
  cmp    %rax,%r12
  jne    L98
  cmp    %r15d,%ebp
  jg     L533
  nopl   (%rax)
L475:
  mov    0x88(%rsp),%rbx
  jmp    L569
  nopl   (%rax)
L262:
  cmp    %r15d,%ebp
  jg     L533
  jmp    L450
  nopw   0x0(%rax,%rax,1)
L630:
  mov    0x58(%rsp),%r14
  mov    %r15d,%edx
  imul   %ecx,%edx
  lea    (%r14,%rcx,4),%rax
  mov    (%r14,%rbx,4),%esi
  mov    (%rax),%ecx
  mov    %esi,(%rax)
  mov    %ecx,(%r14,%rbx,4)
  test   %r15d,%r15d
  jle    L109
  mov    0x40(%rsp),%r14
  movslq %edx,%rdx
  lea    0x0(,%rdx,8),%rcx
  mov    %r14,%rax
  add    $0x10,%rax
  cmp    %rax,%rcx
  lea    0x10(%rcx),%rax
  setge  %sil
  cmp    %r14,%rax
  setle  %al
  or     %sil,%al
  je     L61
  cmpl   $0x1,0x84(%rsp)
  jbe    L61
  mov    %rdx,0x20(%rsp)
  lea    0x0(%r13,%r14,1),%rsi
  add    %r13,%rcx
  xor    %eax,%eax
  mov    0x18(%rsp),%r14d
  mov    0x90(%rsp),%rdx
  nopw   0x0(%rax,%rax,1)
L66:
  movupd (%rsi,%rax,1),%xmm0
  movupd (%rcx,%rax,1),%xmm7
  movups %xmm7,(%rsi,%rax,1)
  movups %xmm0,(%rcx,%rax,1)
  add    $0x10,%rax
  cmp    %rdx,%rax
  jne    L66
  mov    0x88(%rsp),%eax
  mov    0x20(%rsp),%rdx
  mov    %r14d,0x18(%rsp)
  cmp    %r15d,%eax
  je     L401
  mov    0x30(%rsp),%rsi
  add    0xc(%rsp),%eax
  cltq
  add    %rsi,%rdx
  movsd  0x0(%r13,%rax,8),%xmm0
  add    0x10(%rsp),%rsi
  lea    0x0(%r13,%rdx,8),%rax
  movsd  (%rax),%xmm1
  movsd  %xmm1,0x0(%r13,%rsi,8)
  movsd  %xmm0,(%rax)
L401:
  movsd  -0x8(%r11),%xmm6
  jmp    L109
L511:
  cmp    %r8d,%ebp
  jle    L372
  mov    0x10(%rsp),%r8
  lea    0x1(%rbx),%rcx
  movslq %r10d,%rax
  mov    %r15d,%esi
  sub    %edi,%esi
  mov    %rcx,0x28(%rsp)
  shl    $0x3,%rbx
  mov    0x98(%rsp),%r14
  sub    %rax,%r8
  add    %rcx,%rax
  mov    %esi,0x3c(%rsp)
  lea    0x0(,%rax,8),%rdx
  mov    %esi,%eax
  and    $0xfffffffe,%esi
  add    %r11,%r14
  shr    %eax
  mov    %esi,0x48(%rsp)
  add    %edi,%esi
  lea    -0x1(%rax),%ecx
  mov    0xc(%rsp),%eax
  mov    %r14,0x20(%rsp)
  mov    0x18(%rsp),%r14d
  mov    %r12,0x18(%rsp)
  add    $0x1,%rcx
  add    %esi,%eax
  shl    $0x4,%rcx
  cltq
  lea    0x0(%r13,%rax,8),%rdi
  lea    0x0(%r13,%r12,8),%rax
  sub    %rbx,%rax
  mov    0x4c(%rsp),%ebx
  sub    $0x8,%rax
  mov    %rax,0x70(%rsp)
  lea    0x8(%r13,%rbx,8),%rax
  mov    0x50(%rsp),%rbx
  mov    %rax,0x78(%rsp)
  mov    %r15d,%eax
  sub    0x38(%rsp),%eax
  mov    %eax,0x38(%rsp)
  nopl   (%rax)
L174:
  movsd  -0x8(%r13,%rdx,1),%xmm0
  divsd  %xmm6,%xmm0
  movsd  %xmm0,-0x8(%r13,%rdx,1)
  cmp    %rdx,0x20(%rsp)
  je     L437
  cmpl   $0x2,0x38(%rsp)
  je     L437
  movapd %xmm0,%xmm5
  lea    0x0(%r13,%rdx,1),%r12
  xor    %eax,%eax
  unpcklpd %xmm5,%xmm5
  nopw   0x0(%rax,%rax,1)
L366:
  movupd (%r11,%rax,1),%xmm2
  movupd (%r12,%rax,1),%xmm1
  mulpd  %xmm5,%xmm2
  subpd  %xmm2,%xmm1
  movups %xmm1,(%r12,%rax,1)
  add    $0x10,%rax
  cmp    %rcx,%rax
  jne    L366
  mov    0x48(%rsp),%r12d
  cmp    %r12d,0x3c(%rsp)
  je     L25
  mulsd  (%rdi),%xmm0
  lea    (%r10,%rsi,1),%eax
  cltq
  lea    0x0(%r13,%rax,8),%rax
  movsd  (%rax),%xmm1
  subsd  %xmm0,%xmm1
  movsd  %xmm1,(%rax)
L25:
  add    $0x1,%r14d
  add    %r15d,%r10d
  sub    %rbx,%r8
  add    %r9,%rdx
  cmp    %r14d,%ebp
  jne    L174
  mov    0x18(%rsp),%r12
  jmp    L361
  nopl   0x0(%rax)
L437:
  mov    0x70(%rsp),%rax
  mov    0x78(%rsp),%r12
  add    %rdx,%rax
  add    %rdx,%r12
L277:
  movsd  (%rax,%r8,8),%xmm2
  movsd  (%rax),%xmm1
  add    $0x8,%rax
  mulsd  %xmm0,%xmm2
  subsd  %xmm2,%xmm1
  movsd  %xmm1,-0x8(%rax)
  cmp    %r12,%rax
  jne    L277
  jmp    L25
L518:
  mov    0x40(%rsp),%rsi
  mov    0xa8(%rsp),%rcx
  sub    0x10(%rsp),%rax
  lea    0x0(%r13,%rsi,1),%rdx
  add    %rsi,%rcx
  nopl   0x0(%rax)
L493:
  movsd  (%rdx),%xmm0
  movsd  (%rdx,%rax,8),%xmm1
  movsd  %xmm1,(%rdx)
  movsd  %xmm0,(%rdx,%rax,8)
  add    $0x8,%rdx
  cmp    %rcx,%rdx
  jne    L493
  jmp    L367
L61:
  mov    0x40(%rsp),%rsi
  mov    0xa0(%rsp),%rcx
  mov    0x18(%rsp),%r14d
  sub    0x10(%rsp),%rdx
  lea    0x0(%r13,%rsi,1),%rax
  add    %rsi,%rcx
  nop
L253:
  movsd  (%rax),%xmm0
  movsd  (%rax,%rdx,8),%xmm1
  movsd  %xmm1,(%rax)
  movsd  %xmm0,(%rax,%rdx,8)
  add    $0x8,%rax
  cmp    %rcx,%rax
  jne    L253
  mov    %r14d,0x18(%rsp)
  jmp    L401
L479:
  lea    0x1(%r12),%rax
  mov    %rax,0x20(%rsp)
  jmp    L569
L183:
  xor    %eax,%eax
  jmp    L607
L372:
  lea    0x1(%rbx),%rax
  mov    %rax,0x28(%rsp)
  jmp    L361
```

tool_calls: name: extract_symbolic_data
arguments: data_label: D36
datatype: f32[4]
name: extract_symbolic_data
arguments: data_label: D19
datatype: byte[16]
name: extract_symbolic_data
arguments: data_label: D32
datatype: qword

tool: {"D36": [0.0,1.401298464324817e-45,2.802596928649634e-45,4.203895392974451e-45]}

tool: {"D19": [0x04,0x00,0x00,0x00,0x04,0x00,0x00,0x00,0x04,0x00,0x00,0x00,0x04,0x00,0x00,0x00]}

tool: D32: 9223372036854775807

assistant: ```c
int rludecomp(double *A, int M, int N, int *ipiv) {
  int k, j, l, c1, c2, mind, tempi;
  double ld, mult, mval, temp;
  for (k = 0; k < M; ++k)
    ipiv[k] = (double)k;
  if (M > N) {
    for (k = 0; k < N; ++k) {
      mval = fabs(A[k * N + k]);
      mind = k;
      for (j = k + 1; j < M; ++j) {
        if (mval < fabs(A[j * N + k])) {
          mval = A[j * N + k];
          mind = j;
        }
      }
      if (mind != k) {
        c1 = k * N;
        c2 = mind * N;
        tempi = ipiv[mind];
        ipiv[mind] = ipiv[k];
        ipiv[k] = tempi;
        for (j = 0; j < N; j++) {
          temp = A[c1 + j];
          *(A + c1 + j) = *(A + c2 + j);
          *(A + c2 + j) = temp;
        }
      }
      c2 = k * N;
      ld = A[c2 + k];
      if (ld != 0. && k < N) {
        for (j = k + 1; j < M; ++j) {
          c1 = j * N;
          mult = A[c1 + k] /= ld;
          for (l = k + 1; l < N; ++l) {
            A[c1 + l] -= mult * A[c2 + l];
          }
        }
      }
    }
  } else if (M < N) {
    for (k = 0; k < M - 1; ++k) {
      mval = fabs(A[k * N + k]);
      mind = k;
      for (j = k + 1; j < M; ++j) {
        if (mval < fabs(A[j * N + k])) {
          mval = A[j * N + k];
          mind = j;
        }
      }
      if (mind != k) {
        c1 = k * N;
        c2 = mind * N;
        tempi = ipiv[mind];
        ipiv[mind] = ipiv[k];
        ipiv[k] = tempi;
        for (j = 0; j < N; j++) {
          temp = A[c1 + j];
          *(A + c1 + j) = *(A + c2 + j);
          *(A + c2 + j) = temp;
        }
      }
      c2 = k * N;
      ld = A[c2 + k];
      if (ld != 0.) {
        for (j = k + 1; j < M; ++j) {
          c1 = j * N;
          mult = A[c1 + k] /= ld;
          for (l = k + 1; l < N; ++l) {
            A[c1 + l] -= mult * A[c2 + l];
          }
        }
      }
    }
  } else if (M == N) {
    pludecomp(A, N, ipiv);
  }
  return 0;
}
```