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

```asm
<mergeAndCount>:
  endbr64
  push   %r15
  mov    %ecx,%r11d
  push   %r14
  sub    %edx,%r11d
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  movl   $0x0,0x10(%rsp)
  cmp    $0x1,%r11d
  jle    L124
  sar    %r11d
  movslq %r8d,%r14
  movslq %r9d,%r13
  mov    %ecx,%ebp
  lea    (%r11,%rdx,1),%ebx
  mov    %r13d,%r9d
  mov    %r14d,%r8d
  mov    %r11d,0x8(%rsp)
  mov    %ebx,%ecx
  mov    %edx,0x14(%rsp)
  mov    %rdi,%r12
  mov    %rsi,(%rsp)
  call   <mergeAndCount>
  mov    (%rsp),%rsi
  mov    %r13d,%r9d
  mov    %r14d,%r8d
  mov    %ebp,%ecx
  mov    %ebx,%edx
  mov    %r12,%rdi
  mov    %eax,%r15d
  call   <mergeAndCount>
  mov    0x8(%rsp),%r11d
  add    %r15d,%eax
  cmp    %ebx,0x14(%rsp)
  mov    %eax,0x10(%rsp)
  jge    L112
  movslq 0x14(%rsp),%rdi
  lea    -0x1(%r11),%eax
  mov    %ebx,%ecx
  mov    %ebx,%r11d
  xor    %r10d,%r10d
  add    %rdi,%rax
  mov    %rdi,0x18(%rsp)
  lea    (%r12,%rdi,8),%r8
  lea    0x8(%r12,%rax,8),%rax
  mov    %rax,0x8(%rsp)
  nopl   0x0(%rax)
L151:
  mov    (%r8),%rdx
  cmp    %ebx,%ebp
  jle    L167
  movslq %ebx,%rax
  lea    (%r12,%rax,8),%rsi
  jmp    L75
L32:
  add    $0x1,%ebx
  add    $0x8,%rsi
  cmp    %ebx,%ebp
  je     L167
L75:
  mov    (%rsi),%rax
  sub    %rdx,%rax
  cmp    %r14,%rax
  jl     L32
L167:
  movslq %ecx,%rax
  lea    (%r12,%rax,8),%rsi
  cmp    %ecx,%ebp
  jg     L63
  jmp    L113
  nopl   0x0(%rax,%rax,1)
L17:
  add    $0x1,%ecx
  add    $0x8,%rsi
  cmp    %ecx,%ebp
  je     L113
L63:
  mov    (%rsi),%rax
  sub    %rdx,%rax
  cmp    %r13,%rax
  jle    L17
L113:
  cmp    %r11d,%ebp
  jle    L60
  mov    (%rsp),%rdi
  movslq %r11d,%rax
  movslq %r10d,%rsi
  lea    (%r10,%rbp,1),%r9d
  sub    %rax,%rsi
  sub    %r11d,%r9d
  lea    (%rdi,%rsi,8),%r15
  jmp    L80
  nopl   0x0(%rax)
L165:
  mov    %rdi,(%r15,%rax,8)
  lea    0x1(%rax),%r11d
  mov    (%r8),%rdx
  add    $0x1,%rax
  movslq %esi,%r10
  cmp    %esi,%r9d
  je     L60
L80:
  mov    (%r12,%rax,8),%rdi
  mov    %eax,%r11d
  lea    0x1(%r10),%esi
  cmp    %rdx,%rdi
  jl     L165
L141:
  mov    %ecx,%eax
  add    $0x8,%r8
  sub    %ebx,%eax
  add    %eax,0x10(%rsp)
  mov    (%rsp),%rax
  mov    %rdx,(%rax,%r10,8)
  movslq %esi,%r10
  cmp    %r8,0x8(%rsp)
  jne    L151
  sub    0x14(%rsp),%r11d
L7:
  mov    0x18(%rsp),%rax
  mov    (%rsp),%rsi
  lea    0x0(,%r11,8),%edx
  lea    (%r12,%rax,8),%rdi
  call   <memcpy@plt>
L124:
  mov    0x10(%rsp),%eax
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax,%rax,1)
L60:
  lea    0x1(%r10),%esi
  jmp    L141
L112:
  movslq 0x14(%rsp),%rax
  mov    %rax,0x18(%rsp)
  jmp    L7
```

assistant: ```c
int mergeAndCount(long *sums, long *buff, int start, int end, int lower, int upper) {
  if (end - start <= 1)
    return 0;
  int mid = start + (end - start) / 2;
  int cnt = mergeAndCount(sums, buff, start, mid, lower, upper) + mergeAndCount(sums, buff, mid, end, lower, upper);
  int lowerIdx = mid, upperIdx = mid, tempIdx = mid;
  for (int i = start, bi = 0; i < mid; i++, bi++) {
    while (lowerIdx < end && sums[lowerIdx] - sums[i] < lower)
      lowerIdx++;
    while (upperIdx < end && sums[upperIdx] - sums[i] <= upper)
      upperIdx++;
    while (tempIdx < end && sums[tempIdx] < sums[i])
      buff[bi++] = sums[tempIdx++];
    cnt += upperIdx - lowerIdx;
    buff[bi] = sums[i];
  }
  memcpy(sums + start, buff, (tempIdx - start) * sizeof(long));
  return cnt;
}
```