2.ipynb

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   "source": [
    "--- Day 2: Rock Paper Scissors ---\n",
    "\n",
    "https://adventofcode.com/2022/day/2\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
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     "text": [
      "answer: 10994\n"
     ]
    }
   ],
   "source": [
    "input = open('2.txt').read().split('\\n')\n",
    "\n",
    "# First column - opponent's moves\n",
    "# A - rock, B - paper, C - scissors\n",
    "\n",
    "# Second column - my best responses\n",
    "# X for rock, Y for paper, Z for scissors\n",
    "best_responses = {'X': 'Z', 'Z': 'Y', 'Y': 'X'}\n",
    "strategy_guide = {'A': 'X', 'B': 'Y', 'C': 'Z'}\n",
    "\n",
    "# Points\n",
    "# 0 - lost, 1 - rock, 2 - paper, 3 - scissors, 3 - draw, 6 - win\n",
    "points = {'X': 1, 'Y': 2, 'Z': 3}\n",
    "\n",
    "\n",
    "def calc_score(opponent, me):\n",
    "    score = 0\n",
    "    score += points[me]\n",
    "\n",
    "    if opponent == me:\n",
    "        score += 3\n",
    "    elif best_responses[me] == opponent:\n",
    "        score += 6\n",
    "\n",
    "    return score\n",
    "\n",
    "\n",
    "score = 0\n",
    "for turn in input:\n",
    "    opponent_encrypted, me = turn.split()\n",
    "    opponent = strategy_guide[opponent_encrypted]\n",
    "    score += calc_score(opponent, me)\n",
    "\n",
    "print('answer:', score)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "answer: 12526\n"
     ]
    }
   ],
   "source": [
    "worst_responses = dict((v, k) for k, v in best_responses.items())\n",
    "\n",
    "\n",
    "score = 0\n",
    "for turn in input:\n",
    "    opponent_encrypted, round_goal = turn.split()\n",
    "    opponent = strategy_guide[opponent_encrypted]\n",
    "\n",
    "    match round_goal:\n",
    "        case 'X':\n",
    "            me = best_responses[opponent]\n",
    "        case 'Y':\n",
    "            me = opponent\n",
    "        case 'Z':\n",
    "            me = worst_responses[opponent]\n",
    "\n",
    "    score += calc_score(opponent, me)\n",
    "\n",
    "\n",
    "print('answer:', score)\n"
   ]
  }
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