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Leetcode 78Subset： Given a set ofdistinctintegers,nums, return all possible subsets (the power set). Note:The solution set must not contain duplicate subsets. Example: 如果S=[1,2,3], 给出的解集应为： ...

最近要刷leetcode，为了加深理解与记忆，在此做一些总结。题目：2. Add Two NumbersYou are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes cont...

原题附上：The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility)P A H N A P L S I...

原题：Given a 32-bit signed integer, reverse digits of an integer.Example 1:Input: 123 Output: 321 Example 2:Input: -123 Output: -321 Example 3:Input: 120 Output: 21 Note:Assume we are dealing with an e...