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Given an integer array nums, find the sum of the elements between indices i and j (i ≤ j), inclusive. Example: Given nums = [-2, 0, 3, -5, 2, -1] sumR 阅读全文
posted @ 2019-12-08 23:26
xuan_abc
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Given a 2D board and a word, find if the word exists in the grid. The word can be constructed from letters of sequentially adjacent cell, where "adjac 阅读全文
posted @ 2019-12-08 12:38
xuan_abc
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Design a data structure that supports the following two operations: void addWord(word) bool search(word) search(word) can search a literal word or a r 阅读全文
posted @ 2019-12-08 12:00
xuan_abc
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There is a ball in a maze with empty spaces and walls. The ball can go through empty spaces by rolling up, down, left or right, but it won't stop roll 阅读全文
posted @ 2019-12-08 06:51
xuan_abc
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