Merge Sort.ipynb

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     "text": [
      "[20, 32, 34, 43, 45, 56, 67, 89, 90]\n"
     ]
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   "source": [
    "def merge(listA, listB):\n",
    "    newlist = list()\n",
    "    a = 0\n",
    "    b = 0\n",
    "    while a < len(listA) and b < len(listB):\n",
    "        if listA[a] < listB[b]:\n",
    "            newlist.append(listA[a])\n",
    "            a += 1\n",
    "        else:\n",
    "            newlist.append(listB[b])\n",
    "            b += 1\n",
    "    while a < len(listA):\n",
    "        newlist.append(listA[a])\n",
    "        a += 1\n",
    "    while b < len(listB):\n",
    "        newlist.append(listB[b])\n",
    "        b += 1\n",
    "    return newlist\n",
    "\n",
    "def merge_sort(input_list):\n",
    "    if len(input_list) <= 1:\n",
    "        return input_list\n",
    "    else:\n",
    "        mid = len(input_list) // 2\n",
    "        left = merge_sort(input_list[:mid])\n",
    "        right = merge_sort(input_list[mid:])\n",
    "        newlist = merge(left, right)\n",
    "        return newlist\n",
    "\n",
    "a = [56, 89, 45, 34, 90, 32, 20, 67, 43]\n",
    "print(merge_sort(a))"
   ]
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