{
 "metadata": {
  "name": "hw.2"
 },
 "nbformat": 3,
 "nbformat_minor": 0,
 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "# \u641c\u7d22ZOJ\u8ddf\u77e9\u9635\u76f8\u5173\u7684\u9898\u76ee\n",
      "\n",
      "## \u8981\u6c42\n",
      "\n",
      "* \u5728[ZOJ](http://acm.zju.edu.cn/onlinejudge/)\u7684[\u9898\u76ee\u5217\u8868](http://acm.zju.edu.cn/onlinejudge/showProblemsets.do)\u4e2d\u641c\u7d22\u6240\u6709\u5305\u542b\u5173\u952e\u5b57\"matrix\"\u6216\"Matrix\"\u6216\"matrices\"\u6216\"Matrices\"\u7684\u9898\u76ee.\n",
      "* \u5168\u6587\u641c\u7d22.\n",
      "\n",
      "## \u63d0\u793a\n",
      "\n",
      "* \u53c2\u8003\u641c\u7d22CC98\u7684\u4f8b\u5b50.\n",
      "* \u4f7f\u7528[set](http://docs.python.org/2/tutorial/datastructures.html#sets)\u53bb\u9664\u91cd\u590d\u94fe\u63a5.\n",
      "* \u8bd5\u8bd5 `print '[Mm]atrix' or '[Mm]atrices'`\n",
      "* [if x is false, then y, else x](http://docs.python.org/2/library/stdtypes.html#boolean-operations-and-or-not)\n",
      "* \u5df2\u7ecf\u63d0\u793a\u5230\u8fd9\u4e2a\u4efd\u4e0a\u4e86 - -"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import re\n",
      "\n",
      "for s in ('matrix', 'Matrix', 'matrics', 'Matrics'):\n",
      "    print re.match(r'[mM]atrix|[mM]atrics', s) is not None"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "True\n",
        "True\n",
        "True\n",
        "True\n"
       ]
      }
     ],
     "prompt_number": 1
    }
   ],
   "metadata": {}
  }
 ]
}