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

```asm
<main>:
  endbr64
  push   %r15
  lea    D41(%rip),%rdi
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  xor    %ebp,%ebp
  push   %rbx
  lea    D39(%rip),%rbx
  sub    $0x18,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  lea    0x4(%rsp),%rsi
  call   <scanf@plt>
  cmpl   $0xffffffff,0x4(%rsp)
  jl     L67
  nopl   0x0(%rax,%rax,1)
L165:
  mov    %rbx,%rdi
  add    $0x1,%ebp
  call   <printf@plt>
  mov    0x4(%rsp),%edx
  mov    %edx,%eax
  shr    $0x1f,%eax
  add    %edx,%eax
  and    $0xfffffffe,%eax
  cmp    %ebp,%eax
  jge    L165
L67:
  lea    D15(%rip),%r14
  mov    $0x1,%r13d
  xor    %r12d,%r12d
  mov    %r14,%rdi
  lea    D26(%rip),%rbp
  lea    D39(%rip),%rbx
  call   <printf@plt>
  mov    0x4(%rsp),%eax
  cmp    $0x1,%eax
  jle    L176
  nopl   0x0(%rax,%rax,1)
L29:
  mov    %eax,%edx
  xor    %r15d,%r15d
  shr    $0x1f,%edx
  add    %edx,%eax
  sar    %eax
  cmp    %r12d,%eax
  jle    L153
  nopl   0x0(%rax)
L114:
  mov    %rbx,%rdi
  add    $0x1,%r15d
  call   <printf@plt>
  mov    0x4(%rsp),%edx
  mov    %edx,%eax
  shr    $0x1f,%eax
  add    %edx,%eax
  sar    %eax
  sub    %r12d,%eax
  cmp    %r15d,%eax
  jg     L114
L153:
  xor    %r15d,%r15d
  nopl   0x0(%rax)
L112:
  mov    %rbp,%rdi
  add    $0x1,%r15d
  call   <printf@plt>
  cmp    %r13d,%r15d
  jne    L112
  mov    0x4(%rsp),%edx
  xor    %r15d,%r15d
  mov    %edx,%eax
  shr    $0x1f,%eax
  add    %edx,%eax
  sar    %eax
  cmp    %r12d,%eax
  jle    L170
  cs nopw 0x0(%rax,%rax,1)
L48:
  mov    %rbx,%rdi
  add    $0x1,%r15d
  call   <printf@plt>
  mov    0x4(%rsp),%edx
  mov    %edx,%eax
  shr    $0x1f,%eax
  add    %edx,%eax
  sar    %eax
  sub    %r12d,%eax
  cmp    %r15d,%eax
  jg     L48
L170:
  mov    %r14,%rdi
  add    $0x2,%r13d
  call   <printf@plt>
  mov    0x4(%rsp),%eax
  lea    0x1(%r12),%ecx
  mov    %eax,%edx
  shr    $0x1f,%edx
  add    %eax,%edx
  sar    %edx
  cmp    %ecx,%edx
  jle    L4
  mov    %ecx,%r12d
  jmp    L29
  nopl   0x0(%rax,%rax,1)
L176:
  xor    %ebp,%ebp
  cmpl   $0xffffffff,0x4(%rsp)
  lea    D39(%rip),%rbx
  jl     L68
L190:
  mov    %rbx,%rdi
  add    $0x1,%ebp
  call   <printf@plt>
  mov    0x4(%rsp),%edx
  mov    %edx,%eax
  shr    $0x1f,%eax
  add    %edx,%eax
  and    $0xfffffffe,%eax
  cmp    %ebp,%eax
  jge    L190
L68:
  mov    %r14,%rdi
  call   <printf@plt>
  mov    0x8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L178
  add    $0x18,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopw   0x0(%rax,%rax,1)
L4:
  lea    -0x1(%r12),%ebx
  test   %r12d,%r12d
  je     L176
  lea    0x1(%rbx,%rbx,1),%r13d
  lea    D39(%rip),%r12
  cs nopw 0x0(%rax,%rax,1)
L129:
  mov    %eax,%edx
  xor    %r15d,%r15d
  shr    $0x1f,%edx
  add    %edx,%eax
  sar    %eax
  cmp    %ebx,%eax
  jle    L53
L70:
  mov    %r12,%rdi
  add    $0x1,%r15d
  call   <printf@plt>
  mov    0x4(%rsp),%edx
  mov    %edx,%eax
  shr    $0x1f,%eax
  add    %edx,%eax
  sar    %eax
  sub    %ebx,%eax
  cmp    %r15d,%eax
  jg     L70
L53:
  xor    %r15d,%r15d
  nopl   0x0(%rax,%rax,1)
L7:
  mov    %rbp,%rdi
  add    $0x1,%r15d
  call   <printf@plt>
  cmp    %r13d,%r15d
  jne    L7
  mov    0x4(%rsp),%edx
  xor    %r15d,%r15d
  mov    %edx,%eax
  shr    $0x1f,%eax
  add    %edx,%eax
  sar    %eax
  cmp    %ebx,%eax
  jle    L101
  nopl   (%rax)
L19:
  mov    %r12,%rdi
  add    $0x1,%r15d
  call   <printf@plt>
  mov    0x4(%rsp),%edx
  mov    %edx,%eax
  shr    $0x1f,%eax
  add    %edx,%eax
  sar    %eax
  sub    %ebx,%eax
  cmp    %r15d,%eax
  jg     L19
L101:
  mov    %r14,%rdi
  sub    $0x1,%ebx
  sub    $0x2,%r13d
  call   <printf@plt>
  cmp    $0xffffffff,%ebx
  je     L176
  mov    0x4(%rsp),%eax
  jmp    L129
L178:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: extract_symbolic_data
arguments: data_label: D41
datatype: string
name: extract_symbolic_data
arguments: data_label: D39
datatype: string
name: extract_symbolic_data
arguments: data_label: D15
datatype: string
name: extract_symbolic_data
arguments: data_label: D26
datatype: string

tool: D41: %d

tool: D39: *

tool: D15: 


tool: D26:  

assistant: ```c
int main() {
  int n, i, j;
  scanf("%d", &n);
  for (i = 0; i < n / 2 * 2 + 1; i++) {
    printf("*");
  }
  printf("\n");
  for (i = 0; i < n / 2; i++) {
    for (j = 0; j < n / 2 - i; j++) {
      printf("*");
    }
    for (j = 0; j < i * 2 + 1; j++) {
      printf(" ");
    }
    for (j = 0; j < n / 2 - i; j++) {
      printf("*");
    }
    printf("\n");
  }
  for (i -= 2; i >= 0; i--) {
    for (j = 0; j < n / 2 - i; j++) {
      printf("*");
    }
    for (j = 0; j < i * 2 + 1; j++) {
      printf(" ");
    }
    for (j = 0; j < n / 2 - i; j++) {
      printf("*");
    }
    printf("\n");
  }
  for (i = 0; i < n / 2 * 2 + 1; i++) {
    printf("*");
  }
  printf("\n");
  return 0;
}
```