{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "4\n",
      "5 13 8 1000000000\n",
      "1\n",
      "1\n",
      "Wall time: 3.15 s\n"
     ]
    }
   ],
   "source": [
    "%%time\n",
    "import math\n",
    "\n",
    "N = int(input())\n",
    "Ai = list(map(int, input().split()))\n",
    "if Ai == [Ai[0]] * len(Ai):\n",
    "    print(Ai[0])\n",
    "    quit()\n",
    " \n",
    " \n",
    "i = 1\n",
    "min = 1000000000\n",
    "a = Ai[0]\n",
    "\n",
    "for a2 in Ai[1:]:\n",
    "    a_gcd = math.gcd(a, a2)\n",
    "    if min > a_gcd:\n",
    "        min = a_gcd\n",
    "        if min <= 2:\n",
    "            print(min)\n",
    "            quit()\n",
    " \n",
    "print(min)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "4\n",
      "5 13 8 1000000000\n",
      "1\n",
      "Wall time: 3.86 s\n"
     ]
    }
   ],
   "source": [
    "%%time\n",
    "import math\n",
    "from functools import reduce\n",
    "\n",
    "N = int(input())\n",
    "Ai = list(map(int, input().split()))\n",
    "if Ai == [Ai[0]] * len(Ai):\n",
    "    print(Ai[0])\n",
    "    quit()\n",
    "\n",
    "print(reduce(math.gcd, Ai))\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "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": "3.6.3"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 2
}