{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Class Assignment-1 done by Hassan Asghar (Sp16-BCS-073)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "childlist = {'A':'BCF', 'B':'CD', 'C':'BDF', 'F':'CE', 'D':'E'}\n",
    "start = 'A'\n",
    "distination = 'E'\n",
    "visited = {'A':False, 'B':False, 'C':False, 'D':False, 'E':False, 'F':False}\n",
    "path = []"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [],
   "source": [
    "def traverse(s):\n",
    "    visited[s] = True\n",
    "    path.append(s)\n",
    "    if s == distination:\n",
    "        print(path)\n",
    "    else:\n",
    "        child = childlist[s]\n",
    "        for i in range(len(child)):\n",
    "            if visited[child[i]] == False:\n",
    "                traverse(child[i])\n",
    "    path.pop()\n",
    "    visited[s] = False"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "['A', 'B', 'C', 'D', 'E']\n",
      "['A', 'B', 'C', 'F', 'E']\n",
      "['A', 'B', 'D', 'E']\n",
      "['A', 'C', 'B', 'D', 'E']\n",
      "['A', 'C', 'D', 'E']\n",
      "['A', 'C', 'F', 'E']\n",
      "['A', 'F', 'C', 'B', 'D', 'E']\n",
      "['A', 'F', 'C', 'D', 'E']\n",
      "['A', 'F', 'E']\n"
     ]
    }
   ],
   "source": [
    "traverse(start)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
 "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": "3.6.5"
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 "nbformat": 4,
 "nbformat_minor": 2
}