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

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x670,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movl   $0x0,-0x66c(%rbp)
  movl   $0x0,-0x668(%rbp)
  movl   $0x0,-0x664(%rbp)
  movl   $0x0,-0x660(%rbp)
  movl   $0x0,-0x654(%rbp)
  movl   $0x0,-0x65c(%rbp)
  movl   $0x0,-0x658(%rbp)
  lea    D0(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    -0x670(%rbp),%rax
  mov    %rax,%rsi
  lea    D3(%rip),%rax
  mov    %rax,%rdi
  call   <scanf@plt>
  movl   $0x0,-0x66c(%rbp)
  jmp    L169
L172:
  movl   $0x0,-0x664(%rbp)
  jmp    L31
L150:
  mov    -0x66c(%rbp),%eax
  mov    %eax,%esi
  lea    D40(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    -0x650(%rbp),%rcx
  mov    -0x664(%rbp),%eax
  movslq %eax,%rsi
  mov    -0x66c(%rbp),%eax
  movslq %eax,%rdx
  mov    %rdx,%rax
  shl    $0x2,%rax
  add    %rdx,%rax
  shl    $0x2,%rax
  add    %rsi,%rax
  shl    $0x2,%rax
  add    %rcx,%rax
  mov    %rax,%rsi
  lea    D42(%rip),%rax
  mov    %rax,%rdi
  call   <scanf@plt>
  addl   $0x1,-0x664(%rbp)
L31:
  mov    -0x670(%rbp),%eax
  cmp    %eax,-0x664(%rbp)
  jl     L150
  addl   $0x1,-0x66c(%rbp)
L169:
  mov    -0x670(%rbp),%eax
  cmp    %eax,-0x66c(%rbp)
  jl     L172
  movl   $0x0,-0x66c(%rbp)
  jmp    L201
L152:
  mov    $0xa,%edi
  call   <putchar@plt>
  movl   $0x0,-0x664(%rbp)
  jmp    L85
L104:
  mov    -0x664(%rbp),%eax
  movslq %eax,%rcx
  mov    -0x66c(%rbp),%eax
  movslq %eax,%rdx
  mov    %rdx,%rax
  shl    $0x2,%rax
  add    %rdx,%rax
  shl    $0x2,%rax
  add    %rcx,%rax
  mov    -0x650(%rbp,%rax,4),%eax
  mov    %eax,%esi
  lea    D61(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  addl   $0x1,-0x664(%rbp)
L85:
  mov    -0x670(%rbp),%eax
  cmp    %eax,-0x664(%rbp)
  jl     L104
  addl   $0x1,-0x66c(%rbp)
L201:
  mov    -0x670(%rbp),%eax
  cmp    %eax,-0x66c(%rbp)
  jl     L152
  movl   $0x0,-0x664(%rbp)
  jmp    L36
L3:
  movl   $0x0,-0x658(%rbp)
  jmp    L74
L121:
  mov    -0x664(%rbp),%eax
  movslq %eax,%rcx
  mov    -0x658(%rbp),%eax
  movslq %eax,%rdx
  mov    %rdx,%rax
  shl    $0x2,%rax
  add    %rdx,%rax
  shl    $0x2,%rax
  add    %rcx,%rax
  mov    -0x650(%rbp,%rax,4),%eax
  add    %eax,-0x668(%rbp)
  addl   $0x1,-0x658(%rbp)
L74:
  mov    -0x670(%rbp),%eax
  cmp    %eax,-0x658(%rbp)
  jl     L121
  addl   $0x1,-0x664(%rbp)
L36:
  mov    -0x670(%rbp),%eax
  sub    $0x1,%eax
  cmp    %eax,-0x664(%rbp)
  jl     L3
  movl   $0x0,-0x658(%rbp)
  jmp    L108
L178:
  movl   $0x0,-0x664(%rbp)
  jmp    L183
L41:
  mov    -0x664(%rbp),%eax
  movslq %eax,%rcx
  mov    -0x658(%rbp),%eax
  movslq %eax,%rdx
  mov    %rdx,%rax
  shl    $0x2,%rax
  add    %rdx,%rax
  shl    $0x2,%rax
  add    %rcx,%rax
  mov    -0x650(%rbp,%rax,4),%eax
  add    %eax,-0x660(%rbp)
  addl   $0x1,-0x664(%rbp)
L183:
  mov    -0x670(%rbp),%eax
  cmp    %eax,-0x664(%rbp)
  jl     L41
  addl   $0x1,-0x658(%rbp)
L108:
  mov    -0x670(%rbp),%eax
  sub    $0x1,%eax
  cmp    %eax,-0x658(%rbp)
  jl     L178
  mov    -0x660(%rbp),%eax
  cmp    -0x668(%rbp),%eax
  jne    L177
  movl   $0x2,-0x65c(%rbp)
  jmp    L208
L177:
  movl   $0x1,-0x65c(%rbp)
L208:
  cmpl   $0x2,-0x65c(%rbp)
  jne    L182
  lea    D12(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  jmp    L19
L182:
  lea    D57(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
L19:
  mov    $0x0,%eax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L128
  call   <__stack_chk_fail@plt>
L128:
  leave
  ret
```

tool_calls: name: disassemble_data
arguments: data_label: D0
type_infered: string
name: disassemble_data
arguments: data_label: D3
type_infered: string
name: disassemble_data
arguments: data_label: D40
type_infered: string
name: disassemble_data
arguments: data_label: D42
type_infered: string
name: disassemble_data
arguments: data_label: D61
type_infered: string
name: disassemble_data
arguments: data_label: D12
type_infered: string
name: disassemble_data
arguments: data_label: D57
type_infered: string

tool: D0: enter number of rows=

tool: D3: %d

tool: D40: 
 enter number %d=

tool: D42: 	%d

tool: D61:    %d

tool: D12: 
valid

tool: D57: 
 Invalid square

assistant: ```c
int main() {
  int i = 0;
  int n[20][20];
  int check;
  int boss = 0;
  int choice = 0;
  int rows;
  int box = 0;
  int box2 = 0;
  int base = 0;
  int b = 0;
  printf("enter number of rows=");
  scanf("%d", &rows);
  for (i = 0; i < rows; i++) {
    for (choice = 0; choice < rows; choice++) {
      printf("\n enter number %d=", i);
      scanf("\t%d", &n[i][choice]);
    }
  }
  for (i = 0; i < rows; i++) {
    printf("\n");
    for (choice = 0; choice < rows; choice++) {
      printf("   %d", n[i][choice]);
    }
  }
  for (choice = 0; choice < rows - 1; choice++) {
    for (b = 0; b < rows; b++) {
      boss = boss + n[b][choice];
    }
  }
  for (b = 0; b < rows - 1; b++) {
    for (choice = 0; choice < rows; choice++) {
      box = box + n[b][choice];
    }
  }
  if (box == boss) {
    base = 2;
  } else {
    base = 1;
  }
  if (base == 2) {
    printf("\nvalid");
  } else
    printf("\n Invalid square");
  return 0;
}
```