user: What is the c source code of the assembly code below:

```asm
<main>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  sub    $0x748,%rsp
  lea    D30(%rip),%rdi
  mov    %fs:0x28,%rax
  mov    %rax,0x2738(%rsp)
  xor    %eax,%eax
  call   <printf@plt>
  lea    0x1c(%rsp),%rsi
  lea    D27(%rip),%rdi
  call   <scanf@plt>
  mov    0x1c(%rsp),%ebx
  test   %ebx,%ebx
  js     L124
  xor    %esi,%esi
  lea    0x20(%rsp),%rax
  lea    0x1(%rbx),%ebp
  mov    $0xc8,%r10d
  lea    0x1(%rsi),%r11d
  mov    %rax,(%rsp)
  mov    %rax,%r8
  xor    %r9d,%r9d
  cmp    %ebp,%r11d
  je     L122
  nopl   0x0(%rax)
L71:
  mov    %r8,%rdx
  xor    %eax,%eax
  jmp    L83
  nopw   0x0(%rax,%rax,1)
L95:
  movl   $0x1,0xc8(%r8)
  lea    0x1(%rax),%ecx
  add    $0x4,%rdx
  cmp    %eax,%esi
  je     L104
L112:
  mov    %ecx,%eax
L83:
  test   %eax,%eax
  je     L95
  mov    -0x4(%rdx),%ecx
  lea    (%rdx,%r9,1),%rdi
  add    (%rdx),%ecx
  add    $0x4,%rdx
  mov    %ecx,(%rdi,%r10,1)
  lea    0x1(%rax),%ecx
  cmp    %eax,%esi
  jne    L112
L104:
  mov    %r11d,%esi
  add    $0xc8,%r8
  sub    $0xc8,%r9
  add    $0xc8,%r10
  lea    0x1(%rsi),%r11d
  cmp    %ebp,%r11d
  jne    L71
L122:
  mov    (%rsp),%rax
  xor    %r14d,%r14d
  xor    %r13d,%r13d
  lea    D49(%rip),%r12
  lea    D18(%rip),%rbp
  add    $0x4,%rax
  mov    %rax,0x8(%rsp)
  cs nopw 0x0(%rax,%rax,1)
L10:
  sub    %r13d,%ebx
  test   %ebx,%ebx
  jle    L40
  nopw   0x0(%rax,%rax,1)
L55:
  xor    %eax,%eax
  mov    %r12,%rdi
  call   <printf@plt>
  sub    $0x1,%ebx
  jne    L55
L40:
  test   %r13d,%r13d
  je     L12
  mov    (%rsp),%rax
  mov    0x8(%rsp),%rsi
  lea    (%rax,%r14,4),%r15
  lea    -0x1(%r13),%eax
  add    %r14,%rax
  lea    (%rsi,%rax,4),%rbx
  nopl   0x0(%rax)
L32:
  mov    (%r15),%esi
  mov    %rbp,%rdi
  xor    %eax,%eax
  add    $0x4,%r15
  call   <printf@plt>
  cmp    %r15,%rbx
  jne    L32
L12:
  lea    D35(%rip),%rdi
  add    $0x1,%r13d
  add    $0x32,%r14
  call   <puts@plt>
  mov    0x1c(%rsp),%ebx
  cmp    %r13d,%ebx
  jge    L10
L124:
  mov    0x2738(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L81
  add    $0x2748,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L81:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: unpack_data
arguments: data_tag: D30
datatype: string
name: unpack_data
arguments: data_tag: D27
datatype: string
name: unpack_data
arguments: data_tag: D49
datatype: string
name: unpack_data
arguments: data_tag: D18
datatype: string
name: unpack_data
arguments: data_tag: D35
datatype: string

tool: D30: Enter the number of rows: 

tool: D27: %d

tool: D49:    

tool: D18: %6d

tool: D35: 


assistant: ```c
int main() {
  int a[50][50], x, i, j;
  printf("Enter the number of rows: ");
  scanf("%d", &x);
  for (i = 0; i <= x; i++) {
    for (j = 0; j < i; j++) {
      if (j == 0 || j == i) {
        a[i][j] = 1;
      } else {
        a[i][j] = a[i - 1][j] + a[i - 1][j - 1];
      }
    }
  }
  for (i = 0; i <= x; i++) {
    for (j = x - i; j > 0; j--)
      printf("   ");
    for (j = 0; j < i; j++)
      printf("%6d", a[i][j]);
    printf("\n\n");
  }
  return 0;
}
```