Reverse Bits LCCI

翻转数位

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Number of Valid Words for Each Puzzle

猜字谜

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Minimum Flips to Make a OR b Equal to c

逐项右移比较

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XOR Queries of a Subarray

前 n 项和异或

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Pyramid Transition Matrix

递归

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Letter Case Permutationt

字母大小写全排列

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Maximum Number of Occurrences of a Substring

子串的最大出现次数

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Maximum of Absolute Value Expression

曼哈顿距离　

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Bitwise ORs of Subarrays

　

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Number complement

　

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