user: Please show me the C implementation that matches the assembly code listed below:

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  movl   $0x3,-0x10(%rbp)
  movl   $0x4,-0xc(%rbp)
  mov    -0x10(%rbp),%eax
  cltq
  shl    $0x3,%rax
  mov    %rax,%rdi
  call   <malloc@plt>
  mov    %rax,-0x8(%rbp)
  mov    -0x10(%rbp),%eax
  imul   -0xc(%rbp),%eax
  cltq
  shl    $0x2,%rax
  mov    %rax,%rdi
  call   <malloc@plt>
  mov    %rax,%rdx
  mov    -0x8(%rbp),%rax
  mov    %rdx,(%rax)
  movl   $0x1,-0x14(%rbp)
  jmp    L66
L20:
  mov    -0x14(%rbp),%eax
  cltq
  shl    $0x3,%rax
  lea    -0x8(%rax),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0xc(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x14(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rsi
  mov    -0x8(%rbp),%rax
  add    %rsi,%rax
  add    %rcx,%rdx
  mov    %rdx,(%rax)
  addl   $0x1,-0x14(%rbp)
L66:
  mov    -0x14(%rbp),%eax
  cmp    -0x10(%rbp),%eax
  jl     L20
  movl   $0x0,-0x1c(%rbp)
  jmp    L5
L10:
  movl   $0x0,-0x18(%rbp)
  jmp    L35
L46:
  mov    $0x0,%eax
  call   <rand@plt>
  mov    %eax,%ecx
  movslq %ecx,%rax
  imul   $0x2e8ba2e9,%rax,%rax
  shr    $0x20,%rax
  sar    %eax
  mov    %ecx,%esi
  sar    $0x1f,%esi
  sub    %esi,%eax
  mov    %eax,%edx
  mov    %edx,%eax
  shl    $0x2,%eax
  add    %edx,%eax
  add    %eax,%eax
  add    %edx,%eax
  sub    %eax,%ecx
  mov    %ecx,%edx
  mov    -0x1c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rcx
  mov    -0x8(%rbp),%rax
  add    %rcx,%rax
  mov    (%rax),%rcx
  mov    -0x18(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rcx,%rax
  sub    $0x5,%edx
  mov    %edx,(%rax)
  addl   $0x1,-0x18(%rbp)
L35:
  mov    -0x18(%rbp),%eax
  cmp    -0xc(%rbp),%eax
  jl     L46
  addl   $0x1,-0x1c(%rbp)
L5:
  mov    -0x1c(%rbp),%eax
  cmp    -0x10(%rbp),%eax
  jl     L10
  movl   $0x0,-0x1c(%rbp)
  jmp    L71
L69:
  movl   $0x0,-0x18(%rbp)
  jmp    L81
L33:
  mov    -0x1c(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x18(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rdx,%rax
  mov    (%rax),%eax
  mov    %eax,%esi
  lea    D1(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  addl   $0x1,-0x18(%rbp)
L81:
  mov    -0x18(%rbp),%eax
  cmp    -0xc(%rbp),%eax
  jl     L33
  mov    $0xa,%edi
  call   <putchar@plt>
  addl   $0x1,-0x1c(%rbp)
L71:
  mov    -0x1c(%rbp),%eax
  cmp    -0x10(%rbp),%eax
  jl     L69
  mov    -0x8(%rbp),%rax
  mov    (%rax),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    $0x0,%eax
  leave
  ret
```

tool_calls: name: disassemble_data
arguments: tag: D1
type: string

tool: D1: %3d 

assistant: ```c
int main(void) {
  int **x;
  int nl, nc, i, j;
  nl = 3;
  nc = 4;
  x = (int **)malloc(nl * sizeof(int *));
  x[0] = (int *)malloc(nl * nc * sizeof(int));
  for (int i = 1; i < nl; i++) {
    x[i] = x[i - 1] + nc;
  }
  for (i = 0; i < nl; i++) {
    for (j = 0; j < nc; j++) {
      x[i][j] = rand() % 11 - 5;
    }
  }
  for (i = 0; i < nl; i++) {
    for (j = 0; j < nc; j++) {
      printf("%3d ", x[i][j]);
    }
    printf("\n");
  }
  free(x[0]);
  free(x);
  return 0;
}
```