finish day 2 problems

day02.ipynb

@@ -0,0 +1,109 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import re"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 40,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "640\n"
+     ]
+    }
+   ],
+   "source": [
+    "passwords = open('day02-input.txt')\n",
+    "\n",
+    "valid_pass = 0\n",
+    "\n",
+    "for passw in passwords:\n",
+    "    policy = re.match(r\"(\\d+)-(\\d+) (.): (.*)\", passw).groups()\n",
+    "    min = int(policy[0])\n",
+    "    max = int(policy[1])\n",
+    "    pass_char = policy[2]\n",
+    "    password = policy[3]\n",
+    "    counter = 0\n",
+    "    for x in password:\n",
+    "        if x == pass_char:\n",
+    "            counter += 1\n",
+    "    if min <= counter <= max:\n",
+    "        valid_pass +=1\n",
+    "\n",
+    "print(valid_pass)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 42,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "472\n"
+     ]
+    }
+   ],
+   "source": [
+    "passwords = open('day02-input.txt')\n",
+    "\n",
+    "valid_pass = 0\n",
+    "\n",
+    "for passw in passwords:\n",
+    "    policy = re.match(r\"(\\d+)-(\\d+) (.): (.*)\", passw).groups()\n",
+    "    i1 = int(policy[0])\n",
+    "    i2 = int(policy[1])\n",
+    "    pass_char = policy[2]\n",
+    "    password = policy[3]\n",
+    "    if password[i1-1] == pass_char:\n",
+    "        if password[i2-1] != pass_char:\n",
+    "            valid_pass += 1\n",
+    "    else:\n",
+    "        if password[i2-1] == pass_char:\n",
+    "            valid_pass += 1\n",
+    "\n",
+    "print(valid_pass)"
+   ]
+  },
+  {
+   "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": "3.8.5"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 4
+}