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LeetCode 136. Single Number
Given an array of integers, every element appears twice except for one. Find that single one. Note: Your algorithm should have a linear runtime complexity. Could you implement it without using extra原创 2017-09-23 19:12:49 · 324 阅读 · 0 评论 -
LeetCode 242. Valid Anagram
Given two strings s and t, write a function to determine if t is an anagram of s. For example, s = "anagram", t = "nagaram", return true. s = "rat", t = "car", return false. Note: You may ass原创 2017-09-23 21:37:10 · 265 阅读 · 0 评论 -
LeetCode 290. Word Pattern
Given a pattern and a string str, find if str follows the same pattern. Here follow means a full match, such that there is a bijection between a letter in pattern and a non-empty word in str.原创 2017-09-23 22:15:19 · 323 阅读 · 0 评论