user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<longest_bitonic_sequence>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbx
  sub    $0x38,%rsp
  mov    %rdi,%r14
  mov    %esi,-0x5c(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  xor    %eax,%eax
  movslq %esi,%rdx
  shl    $0x2,%rdx
  lea    0xf(%rdx),%rax
  mov    %rax,%rsi
  and    $0xfffffffffffffff0,%rsi
  and    $0xfffffffffffff000,%rax
  mov    %rsp,%rcx
  sub    %rax,%rcx
L78:
  cmp    %rcx,%rsp
  je     L8
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L78
L8:
  mov    %rsi,%rax
  and    $0xfff,%eax
  sub    %rax,%rsp
  test   %rax,%rax
  je     L50
  orq    $0x0,-0x8(%rsp,%rax,1)
L50:
  lea    0x3(%rsp),%rax
  mov    %rax,%rdi
  shr    $0x2,%rdi
  and    $0xfffffffffffffffc,%rax
  mov    %rax,-0x50(%rbp)
  lea    0xf(%rdx),%rax
  mov    %rax,%rsi
  and    $0xfffffffffffffff0,%rsi
  and    $0xfffffffffffff000,%rax
  mov    %rsp,%rcx
  sub    %rax,%rcx
L54:
  cmp    %rcx,%rsp
  je     L160
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L54
L160:
  mov    %rsi,%rax
  and    $0xfff,%eax
  sub    %rax,%rsp
  test   %rax,%rax
  je     L21
  orq    $0x0,-0x8(%rsp,%rax,1)
L21:
  mov    %rsp,%r15
  add    $0xf,%rdx
  mov    %rdx,%rcx
  and    $0xfffffffffffffff0,%rcx
  and    $0xfffffffffffff000,%rdx
  mov    %rsp,%rax
  sub    %rdx,%rax
L138:
  cmp    %rax,%rsp
  je     L11
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L138
L11:
  mov    %rcx,%rax
  and    $0xfff,%eax
  sub    %rax,%rsp
  test   %rax,%rax
  je     L15
  orq    $0x0,-0x8(%rsp,%rax,1)
L15:
  lea    0x3(%rsp),%r13
  mov    %r13,%rax
  shr    $0x2,%rax
  and    $0xfffffffffffffffc,%r13
  mov    (%r14),%edx
  mov    %edx,0x0(,%rax,4)
  movl   $0x1,0x0(,%rdi,4)
  mov    -0x5c(%rbp),%ecx
  cmp    $0x1,%ecx
  jle    L103
  lea    0x4(%r14),%rbx
  mov    -0x50(%rbp),%rax
  add    $0x4,%rax
  mov    %rax,-0x48(%rbp)
  lea    -0x2(%rcx),%eax
  lea    0x8(%r14,%rax,4),%rax
  mov    %rax,-0x58(%rbp)
  mov    $0x1,%r12d
  jmp    L130
L98:
  movslq %r12d,%rax
  mov    (%rbx),%edx
  mov    %edx,0x0(%r13,%rax,4)
  lea    0x1(%r12),%r12d
L165:
  mov    -0x48(%rbp),%rax
  mov    %r12d,(%rax)
  add    $0x4,%rbx
  add    $0x4,%rax
  mov    %rax,-0x48(%rbp)
  cmp    -0x58(%rbp),%rbx
  je     L164
L130:
  mov    (%rbx),%edx
  mov    %r12d,%esi
  mov    %r13,%rdi
  call   <lower_bound@plt>
  cmp    %r12d,%eax
  je     L98
  cltq
  mov    (%rbx),%edx
  mov    %edx,0x0(%r13,%rax,4)
  jmp    L165
L103:
  mov    -0x5c(%rbp),%eax
  sub    $0x1,%eax
  cltq
  movl   $0x1,(%r15,%rax,4)
L113:
  mov    -0x5c(%rbp),%eax
  test   %eax,%eax
  jle    L59
  mov    %eax,%r12d
  mov    $0x0,%ebx
  mov    $0x0,%edi
L39:
  mov    (%r15,%rbx,4),%esi
  mov    -0x50(%rbp),%rax
  add    (%rax,%rbx,4),%esi
  sub    $0x1,%esi
  call   <max@plt>
  mov    %eax,%edi
  add    $0x1,%rbx
  cmp    %rbx,%r12
  jne    L39
L115:
  mov    -0x38(%rbp),%rax
  sub    %fs:0x28,%rax
  jne    L62
  mov    %edi,%eax
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
L56:
  movslq %r12d,%rax
  mov    (%r14,%rbx,4),%edx
  mov    %edx,0x0(%r13,%rax,4)
  lea    0x1(%r12),%r12d
L132:
  mov    %r12d,(%r15,%rbx,4)
  sub    $0x1,%rbx
  test   %ebx,%ebx
  js     L113
L49:
  mov    (%r14,%rbx,4),%edx
  mov    %r12d,%esi
  mov    %r13,%rdi
  call   <lower_bound@plt>
  cmp    %r12d,%eax
  je     L56
  cltq
  mov    (%r14,%rbx,4),%edx
  mov    %edx,0x0(%r13,%rax,4)
  jmp    L132
L59:
  mov    $0x0,%edi
  jmp    L115
L164:
  mov    -0x5c(%rbp),%ecx
  lea    -0x1(%rcx),%eax
  cltq
  movl   $0x1,(%r15,%rax,4)
  lea    -0x2(%rcx),%ebx
  movslq %ebx,%rbx
  mov    $0x1,%r12d
  jmp    L49
L62:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int longest_bitonic_sequence(int v[], int n) {
  int lis[n];
  int lds[n];
  int tail[n], tailSize;
  int i;
  tail[0] = v[0];
  tailSize = 1;
  lis[0] = 1;
  for (i = 1; i < n; ++i) {
    int idx = lower_bound(tail, tailSize, v[i]);
    if (idx == tailSize)
      tail[tailSize++] = v[i];
    else
      tail[idx] = v[i];
    lis[i] = tailSize;
  }
  tailSize = 1;
  lds[n - 1] = 1;
  for (int i = n - 2; i >= 0; --i) {
    int idx = lower_bound(tail, tailSize, v[i]);
    if (idx == tailSize)
      tail[tailSize++] = v[i];
    else
      tail[idx] = v[i];
    lds[i] = tailSize;
  }
  int ans = 0;
  for (int i = 0; i < n; ++i)
    ans = max(ans, lis[i] + lds[i] - 1);
  return ans;
}
```