{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 34,
   "id": "charged-commonwealth",
   "metadata": {},
   "outputs": [],
   "source": [
    "import statistics, math\n",
    "\n",
    "def fuel(positions, rendezvous, consumption):\n",
    "    return sum(map(lambda x: consumption(abs(x-rendezvous)),\n",
    "                   positions))\n",
    "\n",
    "def least_fuel(positions, rendezvous, consumption):\n",
    "    r = math.floor(rendezvous(positions))  \n",
    "    return fuel(positions, r, consumption)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 35,
   "id": "divine-andorra",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "352254"
      ]
     },
     "execution_count": 35,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "import import_ipynb\n",
    "import helper\n",
    "f = helper.read_file('2021_7.txt')\n",
    "\n",
    "positions = list(map(int, f.rstrip().split(',')))\n",
    "least_fuel(positions, \n",
    "           statistics.median, \n",
    "           consumption=lambda x: x)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 36,
   "id": "entertaining-wichita",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "99053143.0"
      ]
     },
     "execution_count": 36,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "least_fuel(positions,\n",
    "           statistics.mean, \n",
    "           consumption=lambda x: x*(x+1)/2)"
   ]
  }
 ],
 "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": "3.9.2"
  },
  "title": "The Treachery of Whales"
 },
 "nbformat": 4,
 "nbformat_minor": 5
}