code: def merge(self, nums1, m, nums2, n):
      """
      :type nums1: List[int]
      :type m: int
      :type nums2: List[int]
      :type n: int
      :rtype: void Do not return anything, modify nums1 in-place instead.
      """
      p1, p2 = m - 1, n - 1
      pos = m + n - 1
      while p1 >= 0 and p2 >= 0:
          if nums1[p1] >= nums2[p2]:
              nums1[pos] = nums1[p1]
              p1 -= 1
          else:
              nums1[pos] = nums2[p2]
              p2 -= 1
          pos -= 1
      while p2 >= 0:
          nums1[pos] = nums2[p2]
          p2 -= 1
          pos -= 1
  
label_desc: Use image node_id 1 for calling the Solution obj's underlying member method code with example usage: obj.merge(nums1, m, nums2, n) without return types