day1.ipynb

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   "source": [
    "def parseInput():\n",
    "    filepath = 'day1_input'\n",
    "    allNumbers = []\n",
    "    with open(filepath) as file:\n",
    "        data = [int(line.rstrip()) for line in file]\n",
    "    return data"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "def getLowerHalfNumbers( allNums, theSum ):\n",
    "    return [ x for x in allNums if x < theSum // 2 ]"
   ]
  },
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   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Part 1"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "allNums = parseInput()\n",
    "lhns = getLowerHalfNumbers( allNums, 2020 )\n",
    "result = [ (x*y) for x in allNums for y in lhns if x + y == 2020 ]\n",
    "result\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Part 2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "result = [ (x*y*z) for x in allNums for y in lhns for z in lhns if x + y + z == 2020 ]\n",
    "result\n",
    "    "
   ]
  }
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