Quick SOrt added

Author: soumyadip007

Sorting/MergeSort-Copy1.ipynb

@@ -0,0 +1,86 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdin",
+     "output_type": "stream",
+     "text": [
+      "Enter the list of numbers:  5 6 3 5 2 1\n"
+     ]
+    },
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Sorted list: [1, 2, 3, 5, 5, 6]\n"
+     ]
+    }
+   ],
+   "source": [
+    "def merge_sort(alist, start, end):\n",
+    "    if end - start > 1:\n",
+    "        mid = (start + end)//2\n",
+    "        merge_sort(alist, start, mid)\n",
+    "        merge_sort(alist, mid, end)\n",
+    "        merge_list(alist, start, mid, end)\n",
+    " \n",
+    "def merge_list(alist, start, mid, end):\n",
+    "    left = alist[start:mid]\n",
+    "    right = alist[mid:end]\n",
+    "    k = start\n",
+    "    i = 0\n",
+    "    j = 0\n",
+    "    while (start + i < mid and mid + j < end):\n",
+    "        if (left[i] <= right[j]):\n",
+    "            alist[k] = left[i]\n",
+    "            i = i + 1\n",
+    "        else:\n",
+    "            alist[k] = right[j]\n",
+    "            j = j + 1\n",
+    "        k = k + 1\n",
+    "    if start + i < mid:\n",
+    "        while k < end:\n",
+    "            alist[k] = left[i]\n",
+    "            i = i + 1\n",
+    "            k = k + 1\n",
+    "    else:\n",
+    "        while k < end:\n",
+    "            alist[k] = right[j]\n",
+    "            j = j + 1\n",
+    "            k = k + 1\n",
+    " \n",
+    " \n",
+    "alist = input('Enter the list of numbers: ').split()\n",
+    "alist = [int(x) for x in alist]\n",
+    "merge_sort(alist, 0, len(alist))\n",
+    "print('Sorted list: ', end='')\n",
+    "print(alist)"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.7.4"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 4
+}