{"id":9305,"date":"2016-06-07T23:30:14","date_gmt":"2016-06-08T03:30:14","guid":{"rendered":"http:\/\/cscircles.cemc.uwaterloo.ca\/?page_id=9305"},"modified":"2017-06-28T19:01:07","modified_gmt":"2017-06-28T23:01:07","slug":"zh-15c","status":"publish","type":"page","link":"https:\/\/cscircles.cemc.uwaterloo.ca\/dev\/zh-15c\/","title":{"rendered":"15C: \u51ef\u6492\u5bc6\u7801"},"content":{"rendered":"<!-- Please retain this notice and add more notes if you create a new version.<br \/>\nOriginal lesson author: David Pritchard, daveagp@gmail.com, http:\/\/cscircles.ca<br \/>\nLicense: http:\/\/creativecommons.org\/licenses\/by-nc-sa\/3.0\/-->\n<p><em>\u7ec3\u4e6015A\u300115Ba\u548c15C\u5b66\u4e60\u987a\u5e8f\u4e0d\u5206\u5148\u540e\u3002<\/em><\/p>\n<p>\u5bc6\u7801\u5b66\u662f\u9690\u85cf\u4fe1\u606f\u7684\u827a\u672f\u548c\u79d1\u5b66\u3002\u5728\u67d0\u79cd\u610f\u4e49\u4e0a\uff0c\u53ea\u6709\u4e00\u4e9b\u4eba\u53ef\u4ee5\u770b\u5230\u5b83\u3002\u5728\u8fd9\u4e00\u8bfe\u4e2d\uff0c\u6211\u4eec\u5c06\u4ecb\u7ecd\u4e00\u4e2a\u6700\u7b80\u5355\u7684\u52a0\u5bc6\u65b9\u6cd5\uff0c<strong><a href=\"http:\/\/en.wikipedia.org\/wiki\/Caesar_cipher\">\u51ef\u6492\u5bc6\u7801<\/a> <\/strong>(\u4e5f\u88ab\u79f0\u4f5c\u00a0<strong>\u79fb\u4f4d\u5bc6\u7801<\/strong>), \u540c\u65f6\u4f60\u4f1a\u5199\u4e00\u4e2a\u7a0b\u5e8f\u6765\u7834\u89e3\u5b83\u3002\u4f60\u9700\u8981\u5168\u65b9\u4f4d\u8bbe\u8ba1\u4f60\u7684\u89e3\u51b3\u65b9\u6848\uff08\u4e0d\u50cf\u8bfe\u7a0b15A\uff0c\u6211\u4eec\u628a\u95ee\u9898\u5206\u4e3a\u4e86\u4e0d\u540c\u90e8\u5206\uff09\u3002<\/p>\n<p>\u51ef\u6492\u5bc6\u7801\u7684\u52a0\u5bc6\u65b9\u6cd5\u662f\uff1a\u6bcf\u5f53\u4f60\u60f3\u8981\u52a0\u5bc6\u4e00\u6bb5\u6587\u5b57\u65f6\uff0c\u4f60\u9700\u8981\u9009\u62e9\u4e00\u4e2a<strong>\u79fb\u4f4d\u503c<\/strong><em> S<\/em>, \u5b83\u662f\u4e00\u4e2a0\u523025\u4e4b\u95f4\u7684\u6574\u6570\u3002\u7136\u540e\uff0c\u4f60\u628a\u6587\u5b57\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5b57\u6bcd\u7528S\u4e2a\u4f4d\u7f6e\u4e4b\u540e\u7684\u5b57\u6bcd\u66ff\u6362\uff08\u5047\u8bbeS=1\uff0c\u90a3\u4e48A\u5c31\u7528B\u66ff\u6362\uff09\u3002\u5982\u679c\u4f4d\u7f6e\u8d85\u8fc7\u4e86Z\uff0c\u90a3\u4e48\u5c31\u8981\u4eceA\u5f00\u59cb\u7ee7\u7eed\u6570\u3002<\/p>\n<h2>\u4f8b\u5b50<\/h2>\n<p>\u5047\u8bbe\u6211\u4eec\u60f3\u5bf9\u4ee5\u4e0b\u79d8\u5bc6\u4fe1\u606f\u8fdb\u884c\u52a0\u5bc6\uff1a<\/p>\n<p style=\"text-align: center;\"><code>JOIN ME AT EIGHT BY THE ZOO<\/code><\/p>\n<p>\u4f7f\u7528\u79fb\u4f4d\u503c <em>S<\/em>=2\u3002\u52a0\u5bc6\u89c4\u5219\u8bf4\u6bcf\u4e2a\u5b57\u6bcd\u90fd\u8981\u88ab\u5728\u5b57\u6bcd\u8868\u4e2d\u5b83\u540e\u4e24\u4f4d\u7684\u5b57\u6bcd\u66ff\u6362\u3002\u4f8b\u5982\uff0c\u5b57\u6bcd\u8868\u662f ABCDEFGHI<strong>J<\/strong>K<strong>L<\/strong>..., \u7b2c\u4e00\u4e2a\u5b57\u6bcd<code>J<\/code>\u4f1a\u88ab\u5b57\u6bcd<code>L<\/code>\u4ee3\u66ff\u3002\u4ee5\u6b64\u7c7b\u63a8\uff0c<code>O<\/code>\u4f1a\u88ab<code>Q<\/code>\u4ee3\u66ff\uff0c<code>I<\/code>\u4f1a\u88ab<code>K<\/code>\u4ee3\u66ff\u3002\u8981\u60f3\u52a0\u5bc6Y, \u6211\u4eec\u5fc5\u987b\u8fd4\u56de\u5230\u5b57\u6bcd\u8868\u7684\u5f00\u59cb\uff1a\u5728Y\u4e4b\u540e\u662fZ\uff0c\u63a5\u7740\u5c31\u662fA\uff0c\u6240\u4ee5<code>Y<\/code>\u4f1a\u88ab<code>A<\/code>\u4ee3\u66ff\u3002\u540c\u6837\u7684\uff0c<code>Z<\/code>\u4f1a\u88ab<code>B<\/code>\u4ee3\u66ff\u3002\u6240\u4ee5\u52a0\u5bc6\u540e\u7684\u6587\u5b57\u5c31\u53d8\u6210\u4e86\uff1a<\/p>\n<p style=\"text-align: center;\"><code>LQKP OG CV GKIJV DA VJG BQQ<\/code><\/p>\n<p>\u5982\u679c\u95f4\u8c0d\u770b\u5230\u4e86\u8fd9\u4e2a\u4fe1\u606f\uff0c\u90a3\u4f60\u7684\u4fe1\u606f\u5bf9\u4ed6\u4eec\u6765\u8bf4\u662f\u6bd4\u8f83\u96be\u7406\u89e3\u7684\u3002<\/p>\n<div class='pybox modeNeutral' id='pybox0'>\n<img title='You have not yet completed this problem.' src='https:\/\/cscircles.cemc.uwaterloo.ca\/dev\/wp-content\/plugins\/pybox\/files\/icon.png' class='pycheck'\/><div class=\"heading\"><span class='type'>Short Answer Exercise: <\/span><span class='title'>\u95f4\u8c0d\u7f16\u7801\u5458<\/span><\/div>\u4f7f\u7528\u79fb\u4f4d\u503c<em>S<\/em>=5\u6765\u52a0\u5bc6<code>SPY CODER<\/code>\u7684\u7ed3\u679c\u4f1a\u662f\u4ec0\u4e48(\u4f7f\u7528\u5927\u5199)\uff1f\u4f60\u8fd8\u53ef\u4ee5\u5728<a href=\"\/console\/\">\u64cd\u4f5c\u53f0<\/a> \u4e2d\u7f16\u5199\u4e00\u4e2a\u7a0b\u5e8f\u6765\u8ba1\u7b97\u5b83\uff0c\u5b83\u5728\u540e\u9762\u53ef\u80fd\u4f1a\u5bf9\u4f60\u6709\u5e2e\u52a9\u3002<br><label for=\"pyShortAnswer0\">Your answer: <\/label><input type=\"text\" onkeypress=\"{if (event.keyCode==13) pbShortCheck(0)}\" id=\"pyShortAnswer0\"><div class=\"pyboxbuttons\"><input type=\"hidden\" name=\"type\" value=\"trimmableString\"\/><input type=\"hidden\" name=\"correct\" value=\"XUD HTIJW\"\/><input type=\"hidden\" name=\"slug\" value=\"15c.encode\"\/><input type=\"hidden\" name=\"lang\" value=\"\"\/><input type='submit' style='margin:5px;' value='Check answer' onClick = 'pbShortCheck(0)'\/><\/div><div class=\"pbresults\" id=\"pyShortResults0\"><\/div><div class=\"epilogue\">Correct!<\/div><\/div>\n<h2>\u89e3\u7801<\/h2>\n<p>\u5f53\u4f60\u7684\u670b\u53cb\u62ff\u5230\u4e00\u6761\u52a0\u5bc6\u4fe1\u606f, \u5982\u679c\u4ed6\u4eec\u77e5\u9053\u79d8\u5bc6\u79fb\u4f4d\u503c<em>S<\/em>\uff0c\u90a3\u4e48\u5bf9\u4e8e\u4ed6\u4eec\u6765\u8bf4\u89e3\u5bc6\u5c31\u53d8\u5f97\u975e\u5e38\u7b80\u5355\uff1a\u6bcf\u4e00\u4e2a\u5b57\u6bcd\u90fd\u88ab\u5b57\u6bcd\u8868\u4e0a<em>S<\/em>\u4f4d<em>\u524d<\/em> \u7684\u5b57\u6bcd\u4ee3\u66ff\u3002\u4f8b\u5982\uff0c\u5f53\u770b\u5230 <code>L<\/code>\uff0c\u4ed6\u4eec\u5c31\u4f1a\u5411\u524d\u79fb\u4e24\u4f4d\u5e76\u627e\u5230<code>J<\/code>\uff0c\u90a3\u4e48\u4ed6\u4eec\u5c31\u77e5\u9053\u4e86\u4f60\u79d8\u5bc6\u4fe1\u606f\u7684\u7b2c\u4e00\u4e2a\u5b57\u6bcd\u3002\u63a5\u7740\uff0c\u4ed6\u4eec\u5fc5\u987b\u628a\u5b57\u6bcd\u8868\u770b\u6210\u4e00\u4e2a\u5706\u5708\uff0c\u5047\u8bbe <code>Z<\/code>\u5728<code>A<\/code>\u4e4b\u524d\u3002<\/p>\n<p><div class='pybox modeNeutral' id='pybox1'>\n<img title='You have not yet completed this problem.' src='https:\/\/cscircles.cemc.uwaterloo.ca\/dev\/wp-content\/plugins\/pybox\/files\/icon.png' class='pycheck'\/><div class=\"heading\"><span class='type'>Short Answer Exercise: <\/span><span class='title'>\u95f4\u8c0d\u89e3\u7801\u5458<\/span><\/div>\u5982\u679c\u52a0\u5bc6\u7684\u4fe1\u606f\u662f<code>HUD<\/code>\uff0c\u79fb\u4f4d\u503c\u00a0<em>S<\/em>=6\uff0c\u90a3\u4e48\u539f\u6765\u7684\u4fe1\u606f\u662f\u4ec0\u4e48(\u8bf7\u4f7f\u7528\u5927\u5199)\uff1f<br><label for=\"pyShortAnswer1\">Your answer: <\/label><input type=\"text\" onkeypress=\"{if (event.keyCode==13) pbShortCheck(1)}\" id=\"pyShortAnswer1\"><div class=\"pyboxbuttons\"><input type=\"hidden\" name=\"type\" value=\"trimmableString\"\/><input type=\"hidden\" name=\"correct\" value=\"BOX\"\/><input type=\"hidden\" name=\"slug\" value=\"15c.decode\"\/><input type=\"hidden\" name=\"lang\" value=\"\"\/><input type='submit' style='margin:5px;' value='Check answer' onClick = 'pbShortCheck(1)'\/><\/div><div class=\"pbresults\" id=\"pyShortResults1\"><\/div><div class=\"epilogue\">Correct!<\/div><\/div>\n<h2>\u4e3a\u574f\u4eba\u5de5\u4f5c<\/h2>\n<p>\u4f60\u88ab\u4e00\u4e2a\u95f4\u8c0d\u96c7\u6765\u5e2e\u52a9\u7834\u89e3\u4e00\u4e2a\u4f7f\u7528\u79fb\u4f4d\u5bc6\u7801\u52a0\u5bc6\u7684\u6d88\u606f\u3002\u4f46\u662f\u95f4\u8c0d\u4e0d\u77e5\u9053<em>S<\/em>\u7684\u503c\u3002\u4f60\u5c06\u8981\u4f7f\u7528\u6570\u636e\u6765\u7f16\u5199\u4e00\u4e2a\u7a0b\u5e8f\uff0c\u5b83\u5c06\u5f88\u6709\u53ef\u80fd\u81ea\u52a8\u627e\u5230<em>S<\/em><\/p>\n<p>\u6211\u4eec\u7684\u65b9\u6cd5\u662f\u4f7f\u7528<strong>\u5b57\u6bcd\u9891\u7387\u5206\u6790<\/strong>\u3002\u5728\u82f1\u8bed\u4e2d\uff0c\u4e00\u4e9b\u5b57\u6bcd\u4f1a\u7ecf\u5e38\u51fa\u73b0(\u6bd4\u5982E)\uff0c\u800c\u53e6\u5916\u4e00\u4e9b\u51fa\u73b0\u7684\u9891\u7387\u4f1a\u5f88\u5c11(\u6bd4\u5982J)\u3002\u4e0b\u9762\u662f\u4e00\u5f20\u57fa\u4e8e\u5728\u5f88\u591a\u6587\u5b57\u4e2d\u5206\u6790\u51fa\u7684\u9891\u7387\u8868\u3002<\/p>\n<table class=\"minyspace\" style=\"text-align: center;\">\n<tbody>\n<tr>\n<th>A<\/th>\n<th>B<\/th>\n<th>C<\/th>\n<th>D<\/th>\n<th>E<\/th>\n<th>F<\/th>\n<th>G<\/th>\n<th>H<\/th>\n<th>I<\/th>\n<\/tr>\n<tr>\n<td>.0817<\/td>\n<td>.0149<\/td>\n<td>.0278<\/td>\n<td>.0425<\/td>\n<td>.1270<\/td>\n<td>.0223<\/td>\n<td>.0202<\/td>\n<td>.0609<\/td>\n<td>.0697<\/td>\n<\/tr>\n<tr>\n<th>J<\/th>\n<th>K<\/th>\n<th>L<\/th>\n<th>M<\/th>\n<th>N<\/th>\n<th>O<\/th>\n<th>P<\/th>\n<th>Q<\/th>\n<th>R<\/th>\n<\/tr>\n<tr>\n<td>.0015<\/td>\n<td>.0077<\/td>\n<td>.0402<\/td>\n<td>.0241<\/td>\n<td>.0675<\/td>\n<td>.0751<\/td>\n<td>.0193<\/td>\n<td>.0009<\/td>\n<td>.0599<\/td>\n<\/tr>\n<tr>\n<th>S<\/th>\n<th>T<\/th>\n<th>U<\/th>\n<th>V<\/th>\n<th>W<\/th>\n<th>X<\/th>\n<th>Y<\/th>\n<th>Z<\/th>\n<th><\/th>\n<\/tr>\n<tr>\n<td>.0633<\/td>\n<td>.0906<\/td>\n<td>.0276<\/td>\n<td>.0098<\/td>\n<td>.0236<\/td>\n<td>.0015<\/td>\n<td>.0197<\/td>\n<td>.0007<\/td>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u4f8b\u5982, L\u7684\u9891\u7387\u662f .0402=4.02%\uff0c\u8868\u660e\u5728\u5e73\u5e38\u7684\u82f1\u8bed\u6587\u5b57\u4e2d\uff0c4.02% \u7684\u5b57\u6bcd\u662fL\u3002<\/p>\n<p>\u628a\u6bcf\u4e2a\u5b57\u6bcd\u5728\u4e0a\u9762\u8868\u683c\u4e2d\u7684\u503c\u79f0\u4e3a<strong>\u5f3a\u5ea6<\/strong>\u3002\u7136\u540e\u521b\u5efa\u6211\u4eec\u7684\u7edf\u8ba1\u65b9\u6cd5\uff1a\u5c06\u4e00\u4e2a\u53e5\u5b50\u7684<strong>\u5f3a\u5ea6<\/strong>\u5b9a\u4e49\u4e3a\u7b49\u4e8e\u6bcf\u4e00\u4e2a\u5b57\u6bcd\u7684\u5f3a\u5ea6\u4e4b\u548c\u3002\u4f8b\u5982\u5b57\u7b26\u4e32<code>GOOD<\/code>\u7684\u5f3a\u5ea6\u662f<\/p>\n<p style=\"text-align: center;\">goodness(\"<code>GOOD<\/code>\") = .0202 + .0751 + .0751 + .0425 = .2129<\/p>\n<p>\u73b0\u5728\uff0c\u9891\u7387\u5206\u6790\u80cc\u540e\u7684\u60f3\u6cd5\u662f\uff0c\u66f4\u9ad8\u5f3a\u5ea6\u7684\u5b57\u7b26\u4e32\u66f4\u53ef\u80fd\u4ee3\u8868\u6b63\u786e\u7684\u82f1\u8bed\u6587\u672c\u3002\u4f8b\u5982\uff0c\u5982\u679c\u95f4\u8c0d\u770b\u5230\u52a0\u5bc6\u7684\u6d88\u606f\u662f\"<code>JRRG<\/code>\"\uff0c\u5b83\u7684\u539f\u59cb\u5185\u5bb9\u53ef\u80fd\u662f\u79fb\u4f4d\u503c<br \/>\nS= 3 \u7684\u201dGOOD\u201d\uff0c\u6216\u8005\u79fb\u4f4d\u503cS= 1 \u7684\u201dIQQF\u201d\u3002\u4f46\u662f\"<code>IQQF<\/code>\" \u7684\u5f3a\u5ea6\u662f<\/p>\n<p style=\"text-align: center;\">goodness(\"<code>IQQF<\/code>\") = .0697 + .0009 + .0009 + .0223 = .0938<\/p>\n<p>\u56e0\u4e3a .0938 &lt; .2129\uff0c\u6240\u4ee5\u4f60\u7684\u7a0b\u5e8f\u5e94\u8be5\u5f97\u51fa\u7ed3\u8bba: <code>GOOD<\/code>\u6bd4<code>IQQF<\/code>\u66f4\u6709\u53ef\u80fd\u662f\u6b63\u786e\u7684\u7834\u89e3\u4fe1\u606f\u3002<\/p>\n<p><table class='pywarn'><tr><td class='pywarnleft'><img src='https:\/\/cscircles.cemc.uwaterloo.ca\/dev\/wp-content\/plugins\/pybox\/files\/warning.png'\/><\/td><td class='pywarnright'><span> \u7528<em>\u5f3a\u5ea6<\/em>\u6765\u6d4b\u91cf\u5b57\u7b26\u4e32\u5e76\u4e0d\u662f\u5b8c\u7f8e\u7684\u3002\u5047\u8bbe\u79d8\u5bc6\u4fe1\u606f\u662f<code>JAZZ<\/code>\uff0c\u5e76\u4e14\u79fb\u4f4d\u503c\u662f<em>S<\/em>=10\uff0c\u6240\u4ee5\u52a0\u5bc6\u540e\u7684\u4fe1\u606f\u662f<code>TKJJ<\/code>. \u5f53\u4f60\u8f93\u5165<code>TKJJ<\/code>\u5230\u4f60\u7684\u89e3\u7801\u7a0b\u5e8f\u4e2d\uff0c\u5b83\u4f1a\u5c1d\u8bd5<em>S<\/em>=10\u4f5c\u4e3a\u4e00\u79cd\u53ef\u80fd\uff0c\u5e76\u7ed9\u51fa\u5f3a\u5ea6\u4e3a.0846\uff0c\u4f46\u5f3a\u5ea6\u6700\u9ad8\u7684\u79fb\u4f4d\u503c\u662f<em>S<\/em>=5\uff0c\u7ed9\u51fa\u5f3a\u5ea6\u4e3a.3514\u7684\u00a0<code>OFEE<\/code> \u4f5c\u4e3a\u5bf9\u79d8\u5bc6\u4fe1\u606f\u7684\u6700\u4f73\u63a8\u6d4b\u3002\u6240\u4ee5\u4f60\u7684\u7a0b\u5e8f\u4f1a\u8f93\u51fa\u4e00\u4e2a\u5e76\u4e0d\u5b58\u5728\u7684\u82f1\u8bed\u5355\u8bcd<code>OFEE<\/code>(\u8fd9\u79cd\u7c7b\u578b\u7684\u9891\u7387\u5206\u6790\u6700\u597d\u662f\u4f7f\u7528\u5728\u8f83\u957f\u7684\u79d8\u5bc6\u4fe1\u606f\u4e0a)\u3002 <\/span><\/td><\/table><\/p>\n<p><form class=\"pbform\" action=\"#\" id=\"pbform2\" method=\"POST\">\n<div class='pybox modeNeutral ' id='pybox2'>\n<img title='You have not yet completed this problem.' src='https:\/\/cscircles.cemc.uwaterloo.ca\/dev\/wp-content\/plugins\/pybox\/files\/icon.png' class='pycheck'\/><div class=\"heading\"><span class='type'>Coding Exercise: <\/span><span class='title'>\u81ea\u52a8\u7834\u89e3<\/span><\/div>\n<div>\u7f16\u5199\u4e00\u4e2a\u7a0b\u5e8f\uff0c\u4f7f\u5b83\u5b8c\u6210\u4ee5\u4e0b\u51e0\u4ef6\u4e8b\uff1a\u9996\u5148\uff0c\u5b83\u5e94\u8be5\u8bfb\u5165\u4e00\u884c\u8f93\u5165\uff0c<br \/>\n\u8fd9\u884c\u5c31\u662f\u88ab\u52a0\u5bc6\u7684\u6d88\u606f\uff0c\u8fd9\u4e2a\u6d88\u606f\u5305\u62ec\u5927\u5199\u5b57\u6bcd\u548c\u7a7a\u683c\u3002\u4f60\u7684\u7a0b\u5e8f\u5fc5\u987b\u6d4b\u8bd5\u6240\u670926\u79cd\u53ef\u80fd\u7684\u79fb\u4f4d\u503c<em>S<\/em>\uff1b\u5728\u8fd926\u4e2a\u53ef\u80fd\u7684\u539f\u6d88\u606f\u4e2d\uff0c\u6253\u5370\u51fa\u90a3\u4e2a\u5f3a\u5ea6\u6700\u9ad8\u7684\u3002<\/div>\n<p>\u4e3a\u4e86\u65b9\u4fbf\u8d77\u89c1\uff0c\u6211\u4eec\u4f1a\u5148\u4e3a\u4f60\u5b9a\u4e49\u597d\u53d8\u91cf<code>letterGoodness<\/code>\uff0c\u5b83\u662f\u4e00\u4e2a\u957f\u5ea6\u4e3a26\u7684\u5217\u8868\uff08\u5217\u8868\u4e2d\u7684\u6bcf\u4e00\u9879\u90fd\u5bf9\u5e94\u4e0a\u65b9\u9891\u7387\u8868\u4e2d\u7684\u503c\uff09\uff0c<\/p>\n<pre>letterGoodness = [.0817,.0149,.0278,.0425,.1270,.0223,.0202,...<\/pre>\n<div><a class=\"hintlink\"  id=\"hintlink3\">\u70b9\u51fb\u8fd9\u91cc\u6765\u8fd9\u770b\u4e00\u4e9b\u57fa\u672c\u5efa\u8bae\u3002<\/a><div class=\"helpOuter\" style=\"display: none;\"><div class=\"helpInner\"><div style=\"text-align: center\">You need to create an account and log in to ask a question.<\/div><\/div><\/div><div class='pyboxTextwrap pyboxCodewrap RW resizy'  style='height: 526px;'><textarea wrap='off' name='usercode2' id='usercode2'  cols=10 rows=20   class='pyboxCode RW'>\nprint(letterGoodness) #testing... it's predefined\n<\/textarea><\/div>\n<div id='pbhistory2' class='flexcontain' style='display:none;'><\/div>\n<input type='hidden' id='defaultCode2' value='print(letterGoodness) #testing... it\\u0027s predefined\\n'><\/input>\n<div class='pyboxbuttons'><table><tr>\n<td><input type='submit' name='submit' id='submit2' value=' '\/><\/td>\n<td><input type='button' name='consolecopy' value=\"Open in console\" onclick=\"pbConsoleCopy(2)\" ><\/td>\n<td><input type='button' name='visualize' value=\"Visualize\" onclick=\"pbVisualize(2,'Y')\" ><\/td>\n<td><input type='button' name='history' value=\"History\" onclick=\"historyClick(2,'15c.autodecrypt')\" ><\/td>\n<\/tr><\/table><select id='pbSelect2' class='selectmore'><option name='more'>More actions...<\/option>\n<option name='default' data-pbonclick=\"pbSetText(2,descape($('#defaultCode2').val()))\" >Reset code to default<\/option>\n<option name='help' data-pbonclick=\"helpClick(2);\" >Help<\/option>\n<\/select><\/div>\n<input type=\"hidden\" name=\"lang\" value=\"\"\/><input type=\"hidden\" id=\"inputInUse2\" name=\"inputInUse\" value=\"Y\"\/>\n<input type=\"hidden\" name=\"pyId\" value=\"2\"\/>\n<input type=\"hidden\" name=\"hash\" value=\"c2d99087473e11f7a6f801618e497a83\"\/>\n<div id='pbresults2' class='pbresults avoidline'><\/div>\n<\/div>\n<\/form>\n<script type='text\/javascript'>jQuery(function(){pbToggleCodeMirror(2);});document.getElementById(\"submit2\").value = \"Run program\";document.getElementById(\"inputInUse2\").value = \"N\";<\/script>\n<\/div>\n<p><table class='pywarn'><tr><td class='pywarnleft'><img src='https:\/\/cscircles.cemc.uwaterloo.ca\/dev\/wp-content\/plugins\/pybox\/files\/warning.png'\/><\/td><td class='pywarnright'><span> \u4e0a\u9762\u7684\u89e3\u51b3\u65b9\u6848\u88ab\u79f0\u4e3a<em>\u66b4\u529b<\/em>\u7834\u89e3\u65b9\u6848\uff0c\u56e0\u4e3a\u4f60\u53ea\u662f\u5c1d\u8bd5\u4e86\u6240\u670926\u79cd\u53ef\u80fd\u6027\u3002\u5982\u679c\u9700\u8981\u7684\u8bdd\uff0c\u4f60\u751a\u81f3\u53ef\u4ee5\u4eba\u5de5\u6765\u505a\u8fd9\u4ef6\u4e8b\u3002\u53e6\u4e00\u65b9\u9762\uff0c\u5728\u73b0\u4ee3\u5bc6\u7801\u534f\u8bae\u4e2d\uff0c\u8fd9\u4e9b\u5bc6\u7801\u8bbe\u8ba1\u7684\u76ee\u7684\uff0c\u90fd\u662f\u4f7f\u66b4\u529b\u7834\u89e3\u65b9\u6848\u5931\u6548\uff08\u5373\u4f7f\u4f60\u4f7f\u7528\u975e\u5e38\u5feb\u7684\u7535\u8111\u6765\u5c1d\u8bd5\u6240\u6709\u7684\u53ef\u80fd\u6027\uff09\u3002 <\/span><\/td><\/table><\/p>\n<p>\u5982\u679c\u4f60\u60f3\u4f7f\u8fd9\u4e2a\u81ea\u52a8\u89e3\u7801\u7cfb\u7edf\u66f4\u51c6\u786e\uff0c\u4f60\u53ef\u4ee5\u6ce8\u610f\u5176\u4ed6\u7684\u82f1\u8bed\u7edf\u8ba1\uff0c\u5982\u201c\u4ec0\u4e48\u5b57\u6bcd\u6709\u53ef\u80fd\u4e0e\u5176\u524d\u9762\u6216\u540e\u9762\u76f8\u8fde\u7684\u5b57\u6bcd\u4e00\u8d77\u51fa\u73b0\uff1f\u4ec0\u4e48\u5b57\u6bcd\u6709\u53ef\u80fd\u5f00\u59cb\u4e00\u4e2a\u5355\u8bcd\u5f00\u5934\uff1f\u201d<\/p>\n<p>\u4f60\u5df2\u7ecf\u5b8c\u6210\u4e86\u8fd9\u8282\u8bfe\uff01\u73b0\u5728\u4f60\u53ef\u4ee5\u7ed9\u4f60\u7684\u670b\u53cb\u53d1\u4e00\u6761\u79d8\u5bc6\u4fe1\u606f\u6765\u5e86\u795d\u4e86\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7ec3\u4e6015A\u300115Ba\u548c15C\u5b66\u4e60\u987a\u5e8f\u4e0d\u5206\u5148\u540e\u3002 \u5bc6\u7801\u5b66\u662f\u9690\u85cf\u4fe1\u606f\u7684\u827a\u672f\u548c\u79d1\u5b66\u3002\u5728\u67d0\u79cd\u610f\u4e49\u4e0a\uff0c\u53ea\u6709\u4e00\u4e9b\u4eba\u53ef\u4ee5\u770b\u5230\u5b83\u3002\u5728\u8fd9\u4e00\u8bfe\u4e2d\uff0c\u6211\u4eec\u5c06\u4ecb\u7ecd\u4e00\u4e2a\u6700\u7b80\u5355\u7684\u52a0\u5bc6\u65b9\u6cd5\uff0c\u51ef\u6492\u5bc6\u7801 (\u4e5f\u88ab\u79f0\u4f5c\u00a0\u79fb\u4f4d\u5bc6\u7801), \u540c\u65f6\u4f60\u4f1a\u5199\u4e00\u4e2a\u7a0b\u5e8f\u6765\u7834\u89e3\u5b83\u3002\u4f60\u9700\u8981\u5168\u65b9\u4f4d\u8bbe\u8ba1\u4f60\u7684\u89e3\u51b3\u65b9\u6848\uff08\u4e0d\u50cf\u8bfe\u7a0b15A\uff0c\u6211\u4eec\u628a\u95ee\u9898\u5206\u4e3a\u4e86\u4e0d\u540c\u90e8\u5206\uff09\u3002 \u51ef\u6492\u5bc6\u7801\u7684\u52a0\u5bc6\u65b9\u6cd5\u662f\uff1a\u6bcf\u5f53\u4f60\u60f3\u8981\u52a0\u5bc6\u4e00\u6bb5\u6587\u5b57\u65f6\uff0c\u4f60\u9700\u8981\u9009\u62e9\u4e00\u4e2a\u79fb\u4f4d\u503c S, \u5b83\u662f\u4e00\u4e2a0\u523025\u4e4b\u95f4\u7684\u6574\u6570\u3002\u7136\u540e\uff0c\u4f60\u628a\u6587\u5b57\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5b57\u6bcd\u7528S\u4e2a\u4f4d\u7f6e\u4e4b\u540e\u7684\u5b57\u6bcd\u66ff\u6362\uff08\u5047\u8bbeS=1\uff0c\u90a3\u4e48A\u5c31\u7528B\u66ff\u6362\uff09\u3002\u5982\u679c\u4f4d\u7f6e\u8d85\u8fc7\u4e86Z\uff0c\u90a3\u4e48\u5c31\u8981\u4eceA\u5f00\u59cb\u7ee7\u7eed\u6570\u3002 \u4f8b\u5b50 \u5047\u8bbe\u6211\u4eec\u60f3\u5bf9\u4ee5\u4e0b\u79d8\u5bc6\u4fe1\u606f\u8fdb\u884c\u52a0\u5bc6\uff1a JOIN ME AT EIGHT BY THE ZOO \u4f7f\u7528\u79fb\u4f4d\u503c S=2\u3002\u52a0\u5bc6\u89c4\u5219\u8bf4\u6bcf\u4e2a\u5b57\u6bcd\u90fd\u8981\u88ab\u5728\u5b57\u6bcd\u8868\u4e2d\u5b83\u540e\u4e24\u4f4d\u7684\u5b57\u6bcd\u66ff\u6362\u3002\u4f8b\u5982\uff0c\u5b57\u6bcd\u8868\u662f ABCDEFGHIJKL..., \u7b2c\u4e00\u4e2a\u5b57\u6bcdJ\u4f1a\u88ab\u5b57\u6bcdL\u4ee3\u66ff\u3002\u4ee5\u6b64\u7c7b\u63a8\uff0cO\u4f1a\u88abQ\u4ee3\u66ff\uff0cI\u4f1a\u88abK\u4ee3\u66ff\u3002\u8981\u60f3\u52a0\u5bc6Y, \u6211\u4eec\u5fc5\u987b\u8fd4\u56de\u5230\u5b57\u6bcd\u8868\u7684\u5f00\u59cb\uff1a\u5728Y\u4e4b\u540e\u662fZ\uff0c\u63a5\u7740\u5c31\u662fA\uff0c\u6240\u4ee5Y\u4f1a\u88abA\u4ee3\u66ff\u3002\u540c\u6837\u7684\uff0cZ\u4f1a\u88abB\u4ee3\u66ff\u3002\u6240\u4ee5\u52a0\u5bc6\u540e\u7684\u6587\u5b57\u5c31\u53d8\u6210\u4e86\uff1a LQKP OG CV GKIJV DA VJG BQQ \u5982\u679c\u95f4\u8c0d\u770b\u5230\u4e86\u8fd9\u4e2a\u4fe1\u606f\uff0c\u90a3\u4f60\u7684\u4fe1\u606f\u5bf9\u4ed6\u4eec\u6765\u8bf4\u662f\u6bd4\u8f83\u96be\u7406\u89e3\u7684\u3002 Short Answer Exercise: \u95f4\u8c0d\u7f16\u7801\u5458\u4f7f\u7528\u79fb\u4f4d\u503cS=5\u6765\u52a0\u5bc6SPY CODER\u7684\u7ed3\u679c\u4f1a\u662f\u4ec0\u4e48(\u4f7f\u7528\u5927\u5199)\uff1f\u4f60\u8fd8\u53ef\u4ee5\u5728\u64cd\u4f5c\u53f0 \u4e2d\u7f16\u5199\u4e00\u4e2a\u7a0b\u5e8f\u6765\u8ba1\u7b97\u5b83\uff0c\u5b83\u5728\u540e\u9762\u53ef\u80fd\u4f1a\u5bf9\u4f60\u6709\u5e2e\u52a9\u3002Your answer: Correct! \u89e3\u7801 \u5f53\u4f60\u7684\u670b\u53cb\u62ff\u5230\u4e00\u6761\u52a0\u5bc6\u4fe1\u606f, \u5982\u679c\u4ed6\u4eec\u77e5\u9053\u79d8\u5bc6\u79fb\u4f4d\u503cS\uff0c\u90a3\u4e48\u5bf9\u4e8e\u4ed6\u4eec\u6765\u8bf4\u89e3\u5bc6\u5c31\u53d8\u5f97\u975e\u5e38\u7b80\u5355\uff1a\u6bcf\u4e00\u4e2a\u5b57\u6bcd\u90fd\u88ab\u5b57\u6bcd\u8868\u4e0aS\u4f4d\u524d &hellip; <a href=\"https:\/\/cscircles.cemc.uwaterloo.ca\/dev\/zh-15c\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-9305","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/cscircles.cemc.uwaterloo.ca\/dev\/wp-json\/wp\/v2\/pages\/9305","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cscircles.cemc.uwaterloo.ca\/dev\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/cscircles.cemc.uwaterloo.ca\/dev\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/cscircles.cemc.uwaterloo.ca\/dev\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cscircles.cemc.uwaterloo.ca\/dev\/wp-json\/wp\/v2\/comments?post=9305"}],"version-history":[{"count":12,"href":"https:\/\/cscircles.cemc.uwaterloo.ca\/dev\/wp-json\/wp\/v2\/pages\/9305\/revisions"}],"predecessor-version":[{"id":10237,"href":"https:\/\/cscircles.cemc.uwaterloo.ca\/dev\/wp-json\/wp\/v2\/pages\/9305\/revisions\/10237"}],"wp:attachment":[{"href":"https:\/\/cscircles.cemc.uwaterloo.ca\/dev\/wp-json\/wp\/v2\/media?parent=9305"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}