150. Evaluate Reverse Polish Notation 中等题 出现73次 LeetCode - The World's Leading Online Programming Learning Platformleetcode.com/problems/evaluate-reverse-polish-notation/description/ 这道题跟判断括号合法性一样经典。。一眼就看出来是stack。发布...
2. The same DFS based on stack 405 Convert a Number to Hexadecimal Python Java Two's complement 1. Bit manipulate, each time handle 4 digits2. Python (hex) and Java API (toHexString & Integer.toHexString) 408 Valid Word Abbreviation ♥ Python Go over abbr and word, O(n) and O(1)...
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AddressSanitizer: stack-overflow on address 0x7ffcc2642ff8 (pc 0x0000003b8738 bp 0x7ffcc2643010 sp 0x7ffcc2643000 T0) 最后执行的输入: [28,-98,67,null,-89,62,null,-97,-25,null,64,null,null,-72,-9,null,null,-88,-41,null,-7,null,-78,-53,null,null,2,-85,-77,-69,-42,-...
层与层之间,是靠recursion传递current path,一个数一个数加的 notice:每一次跳出时,要删去最后一个元素 图:新生大学 https://leetcode.com/problems/permutations/ Given a collection of distinct numbers, return all possible permutations. For example, ...
739.每日温度 给定一个整数数组temperatures，表示每天的温度，返回一个数组answer，其中answer[i]是指对于...
下面的思路借鉴自讨论区(https://leetcode.com/problems/maximum-xor-of-two-numbers-in-an-array/discuss/91049/Java-O(n%29-solution-using-bit-manipulation-and-HashMap)的一个解法。现在 Medium 的题目居然也需要看解答了,叹气。 代码语言:javascript 复制 class Solution { public int findMaximumXOR(int[...
In principle, the board is infinite, which would cause problems when the active area encroaches the border of the array. How would you address these problems? 【解答】状态转换的问题,把代码逻辑想清楚再写。这类题算法本身不难,也没什么变态 case,关键是代码逻辑要规划清楚。 设置了四种状态:1:live,...
we may silently remove the votes and have the LeetCode accounts deactivated without prior warning.". What is malacious voting behaviour - if I upvoted 20 posts in a day - I spent entire day on LeetCode solving different problems and unknowingly up voted as many as 20, because they were ...