user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<lcss>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  mov    %rdi,-0x28(%rbp)
  mov    %esi,-0x2c(%rbp)
  mov    %rdx,-0x38(%rbp)
  mov    %ecx,-0x30(%rbp)
  cmpq   $0x0,-0x28(%rbp)
  je     L18
  cmpq   $0x0,-0x38(%rbp)
  je     L18
  cmpl   $0x1,-0x2c(%rbp)
  jle    L18
  cmpl   $0x1,-0x30(%rbp)
  jg     L49
L18:
  mov    $0x0,%eax
  jmp    L65
L49:
  addl   $0x1,-0x2c(%rbp)
  addl   $0x1,-0x30(%rbp)
  movl   $0x0,-0x10(%rbp)
  movl   $0x0,-0xc(%rbp)
  mov    -0x2c(%rbp),%eax
  cltq
  mov    %eax,%edx
  mov    -0x30(%rbp),%eax
  cltq
  imul   %edx,%eax
  shl    $0x2,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x8(%rbp)
  mov    -0x2c(%rbp),%eax
  cltq
  mov    %eax,%edx
  mov    -0x30(%rbp),%eax
  cltq
  imul   %edx,%eax
  shl    $0x2,%eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%rax
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <memset@plt>
  movl   $0x1,-0x18(%rbp)
  jmp    L1
L99:
  movl   $0x1,-0x14(%rbp)
  jmp    L39
L82:
  mov    -0x18(%rbp),%eax
  imul   -0x30(%rbp),%eax
  mov    %eax,%edx
  mov    -0x14(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x10(%rbp)
  mov    -0x10(%rbp),%eax
  sub    -0x30(%rbp),%eax
  sub    $0x1,%eax
  mov    %eax,-0xc(%rbp)
  mov    -0x18(%rbp),%eax
  cltq
  shl    $0x2,%rax
  lea    -0x4(%rax),%rdx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%edx
  mov    -0x14(%rbp),%eax
  cltq
  shl    $0x2,%rax
  lea    -0x4(%rax),%rcx
  mov    -0x38(%rbp),%rax
  add    %rcx,%rax
  mov    (%rax),%eax
  cmp    %eax,%edx
  jne    L85
  mov    -0xc(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%edx
  mov    -0x10(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x8(%rbp),%rax
  add    %rcx,%rax
  add    $0x1,%edx
  mov    %edx,(%rax)
  jmp    L0
L85:
  mov    -0xc(%rbp),%eax
  cltq
  add    $0x1,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%edx
  mov    -0x10(%rbp),%eax
  cltq
  shl    $0x2,%rax
  lea    -0x4(%rax),%rcx
  mov    -0x8(%rbp),%rax
  add    %rcx,%rax
  mov    (%rax),%eax
  mov    -0x10(%rbp),%ecx
  movslq %ecx,%rcx
  lea    0x0(,%rcx,4),%rsi
  mov    -0x8(%rbp),%rcx
  add    %rsi,%rcx
  cmp    %eax,%edx
  cmovge %edx,%eax
  mov    %eax,(%rcx)
L0:
  addl   $0x1,-0x14(%rbp)
L39:
  mov    -0x14(%rbp),%eax
  cmp    -0x30(%rbp),%eax
  jl     L82
  addl   $0x1,-0x18(%rbp)
L1:
  mov    -0x18(%rbp),%eax
  cmp    -0x2c(%rbp),%eax
  jl     L99
  mov    -0x2c(%rbp),%eax
  imul   -0x30(%rbp),%eax
  cltq
  shl    $0x2,%rax
  lea    -0x4(%rax),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,-0xc(%rbp)
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  movq   $0x0,-0x8(%rbp)
  mov    -0xc(%rbp),%eax
L65:
  leave
  ret
```

assistant: ```c
int lcss(int *x, int nx, int *y, int ny) {
  if (!x || !y || nx < 2 || ny < 2) {
    return 0;
  }
  nx += 1;
  ny += 1;
  int k = 0, l = 0;
  int *matrix = (int *)malloc(sizeof(int) * nx * ny);
  memset(matrix, 0, sizeof(int) * nx * ny);
  for (int i = 1; i < nx; ++i) {
    for (int j = 1; j < ny; ++j) {
      k = i * ny + j;
      l = k - ny - 1;
      if (x[i - 1] == y[j - 1]) {
        matrix[k] = matrix[l] + 1;
      } else {
        matrix[k] = (matrix[l + 1]) < (matrix[k - 1]) ? (matrix[k - 1]) : (matrix[l + 1]);
      }
    }
  }
  l = matrix[nx * ny - 1];
  free(matrix);
  matrix = NULL;
  return l;
}
```