{
 "metadata": {
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.8.6-final"
  },
  "orig_nbformat": 2,
  "kernelspec": {
   "name": "python3",
   "display_name": "Python 3.8.6 64-bit",
   "metadata": {
    "interpreter": {
     "hash": "1ddf53fa84779e14f0db18342168679c9c165a81c5f324dac828befab228d68d"
    }
   }
  }
 },
 "nbformat": 4,
 "nbformat_minor": 2,
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Get puzzle input from input file\n",
    "\n",
    "puzzle_input = open(\"input\").read()"
   ]
  },
  {
   "source": [
    "# Part 1 #"
   ],
   "cell_type": "markdown",
   "metadata": {}
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "output_type": "stream",
     "name": "stdout",
     "text": [
      "2572\n"
     ]
    }
   ],
   "source": [
    "delivered = {(0,0)}\n",
    "\n",
    "x, y = 0, 0\n",
    "ops = {\n",
    "    \"^\": [+0, +1],\n",
    "    \"v\": [-0, -1],\n",
    "    \"<\": [-1, -0],\n",
    "    \">\": [+1, +0]\n",
    "}\n",
    "for char in puzzle_input:\n",
    "    dx, dy = ops[char]\n",
    "    x += dx\n",
    "    y += dy\n",
    "    delivered.add((x, y))\n",
    "print(len(delivered))"
   ]
  },
  {
   "source": [
    "# Part 2 #"
   ],
   "cell_type": "markdown",
   "metadata": {}
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "output_type": "stream",
     "name": "stdout",
     "text": [
      "2631\n"
     ]
    }
   ],
   "source": [
    "delivered = {(0,0)}\n",
    "\n",
    "santa = (0, 0)\n",
    "robo_santa = (0, 0)\n",
    "ops = {\n",
    "    \"^\": [+0, +1],\n",
    "    \"v\": [-0, -1],\n",
    "    \"<\": [-1, -0],\n",
    "    \">\": [+1, +0]\n",
    "}\n",
    "robot = False\n",
    "for char in puzzle_input:\n",
    "    dx, dy = ops[char]\n",
    "    if robot:\n",
    "        robo_santa = (robo_santa[0]+dx, robo_santa[1]+dy)\n",
    "        delivered.add(robo_santa)\n",
    "    else:\n",
    "        santa = (santa[0]+dx, santa[1]+dy)\n",
    "        delivered.add(santa)\n",
    "    robot = not robot\n",
    "print(len(delivered))"
   ]
  }
 ]
}