user: Demonstrate the C code that generates the assembly output below:

```asm
<InitEtaN>:
  endbr64
  push   %r15
  mov    %rdi,%r15
  push   %r14
  mov    %edx,%r14d
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %rsi,0x10(%rsp)
  test   %edx,%edx
  jle    L101
  lea    0x1(%rdx),%eax
  movl   $0x0,0x4(%rsp)
  mov    $0xffffffff,%ebp
  imul   %edx,%eax
  sar    %eax
  mov    %eax,0x1c(%rsp)
  lea    -0x1(%rdx),%eax
  mov    %eax,0x18(%rsp)
  nopl   (%rax)
L96:
  lea    0x1(%rbp),%eax
  cmp    %ebp,%r14d
  jle    L121
  mov    %eax,%esi
  mov    %eax,0xc(%rsp)
  lea    0x2(%rbp),%eax
  mov    %ebp,%r13d
  imul   %esi,%eax
  mov    %eax,%r12d
  shr    $0x1f,%r12d
  add    %eax,%r12d
  mov    0x1c(%rsp),%eax
  sar    %r12d
  lea    0x1(%rax,%rbp,1),%eax
  neg    %r12d
  mov    %eax,0x8(%rsp)
  mov    %eax,%ebx
  jmp    L19
  nopl   0x0(%rax,%rax,1)
L116:
  mov    0x4(%rsp),%eax
  lea    (%r12,%rax,1),%ebx
  add    %r13d,%ebx
  cmp    %r13d,%ebp
  cmove  0x8(%rsp),%ebx
L19:
  mov    $0x8,%edi
  movslq %ebx,%rbx
  add    $0x1,%r13d
  call   <malloc@plt>
  movabs $0xffffffff00000000,%rsi
  mov    %rax,(%r15,%rbx,8)
  mov    %rsi,(%rax)
  cmp    %r13d,%r14d
  jne    L116
  add    %r14d,0x4(%rsp)
  mov    0xc(%rsp),%ebp
  cmp    %ebp,0x18(%rsp)
  jne    L96
L101:
  mov    0x10(%rsp),%rax
  mov    (%rax),%r10d
  cmp    $0xffffffff,%r10d
  je     L100
  lea    0x1(%r14),%eax
  xor    %r13d,%r13d
  imul   %r14d,%eax
  mov    %eax,%r12d
  shr    $0x1f,%r12d
  add    %eax,%r12d
  sar    %r12d
  add    $0x1,%r12d
  nopl   0x0(%rax,%rax,1)
L35:
  mov    %r13d,%ebp
  test   %r10d,%r10d
  js     L54
  mov    $0xffffffff,%ecx
  xor    %r11d,%r11d
  nopl   0x0(%rax,%rax,1)
L50:
  lea    0x1(%rcx),%ebx
  cmp    %r10d,%r14d
  jle    L61
  lea    0x2(%rcx),%edx
  lea    0x1(%rcx),%ebx
  mov    %r11d,%edi
  imul   %ebx,%edx
  lea    (%r12,%rcx,1),%r9d
  mov    %edx,%eax
  shr    $0x1f,%eax
  add    %edx,%eax
  mov    %r10d,%edx
  sar    %eax
  sub    %eax,%edi
  cs nopw 0x0(%rax,%rax,1)
L18:
  cmp    %ecx,%edx
  lea    (%rdi,%rdx,1),%eax
  cmove  %r9d,%eax
  cltq
  mov    (%r15,%rax,8),%rax
  addl   $0x1,(%rax)
  cmpl   $0xffffffff,0x4(%rax)
  jne    L109
  mov    %ebp,0x4(%rax)
L109:
  add    $0x1,%edx
  cmp    %edx,%r14d
  jne    L18
L61:
  add    %r14d,%r11d
  mov    %ebx,%ecx
  cmp    %r10d,%ebx
  jne    L50
L54:
  mov    0x10(%rsp),%rax
  add    $0x1,%r13
  mov    (%rax,%r13,4),%r10d
  cmp    $0xffffffff,%r10d
  jne    L35
L100:
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L121:
  mov    %eax,0xc(%rsp)
  mov    0xc(%rsp),%ebp
  add    %r14d,0x4(%rsp)
  cmp    %ebp,0x18(%rsp)
  jne    L96
  jmp    L101
```

assistant: ```c
void InitEtaN(int **etaN, const int *nicks, int seqlength) {
  int i, j, k, nick;
  int indexE;
  for (i = 0; i <= seqlength - 1; i++) {
    for (j = i - 1; j <= seqlength - 1; j++) {
      indexE = ((j) == (i)-1 ? (seqlength) * ((seqlength) + 1) / 2 + (i) : ((i) * (seqlength) + (j) - (i) * (1 + (i)) / 2));
      etaN[indexE] = (int *)malloc(2 * sizeof(int));
      etaN[indexE][0] = 0;
      etaN[indexE][1] = -1;
    }
  }
  k = 0;
  nick = nicks[k];
  while (nick != -1) {
    for (i = 0; i <= nick; i++) {
      for (j = nick; j <= seqlength - 1; j++) {
        indexE = ((j) == (i)-1 ? (seqlength) * ((seqlength) + 1) / 2 + (i) : ((i) * (seqlength) + (j) - (i) * (1 + (i)) / 2));
        etaN[indexE][0]++;
        if (etaN[indexE][1] == -1) {
          etaN[indexE][1] = k;
        }
      }
    }
    nick = nicks[++k];
  }
}
```