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【题目描述】 Implement an algorithm to delete a node in the middle of a singly linked list, given only access to that node. 给定一个单链表中的一个等待被删除的节点(非表头或表尾)。请在在O 阅读全文
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【题目描述】 Print numbers from 1 to the largest number with N digits by recursion. Notice It's pretty easy to do recursion like: recursion(i) { if i > larg 阅读全文
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【题目描述】 Given an expression string array, return the Reverse Polish notation of this expression. (remove the parentheses) 给定一个表达式字符串数组，返回该表达式的逆波兰表达式（即去 阅读全文
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【题目描述】 Given an expression string array, return the final result of this expression Notice：The expression contains only integer,+,-,*,/,(,). 给一个用字符串表示 阅读全文
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【题目描述】 The structure of Expression Tree is a binary tree to evaluate certain expressions. All leaves of the Expression Tree have an number string valu 阅读全文