2014年10月19日
摘要：
problem：Givennpairs of parentheses, write a function to generate all combinations of well-formed parentheses.For example, givenn= 3, a solution set is... 阅读全文
posted @ 2014-10-19 23:46
higerzhang
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摘要：
Problem：Given a string containing just the characters'(',')','{','}','['and']', determine if the input string is valid.The brackets must close in the ... 阅读全文
posted @ 2014-10-19 00:19
higerzhang
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