1_3_missing_element.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "import collections"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 70,
   "metadata": {},
   "outputs": [],
   "source": [
    "def finder(arr1,arr2):\n",
    "    \n",
    "    d=collections.defaultdict(int)\n",
    "    s=[]\n",
    "    \n",
    "    for num in arr2:\n",
    "        d[num]+=1\n",
    "        #print ('d',d)\n",
    "    \n",
    "    for num in arr1:\n",
    "        if d[num]==0:\n",
    "            s.append(num)\n",
    "        else:\n",
    "            d[num]-=1\n",
    "            #print ('d',d)\n",
    "    print (arr1)\n",
    "    print (arr2)\n",
    "    print (s)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 71,
   "metadata": {},
   "outputs": [],
   "source": [
    "arr1=[5,5,7,7,4]\n",
    "arr2=[5,3,7]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 72,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[5, 5, 7, 7, 4]\n",
      "[5, 3, 7]\n",
      "[5, 7, 4]\n"
     ]
    }
   ],
   "source": [
    "finder(arr1,arr2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 64,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[5, 5, 7, 7, 4, 5, 3, 7]"
      ]
     },
     "execution_count": 64,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr1+arr2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 65,
   "metadata": {},
   "outputs": [],
   "source": [
    "def finder3(arr1,arr2):\n",
    "    result=0\n",
    "    for num in arr1+arr2:\n",
    "        result^=num\n",
    "        print (result)\n",
    "        "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 66,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "5\n",
      "0\n",
      "7\n",
      "0\n",
      "4\n",
      "1\n",
      "2\n",
      "5\n"
     ]
    }
   ],
   "source": [
    "finder3(arr1,arr2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
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