YRB

2015年12月20日

摘要：题目： For a undirected graph with tree characteristics, we can choose any node as the root. The result graph is then a rooted tree. Among all possible r 阅读全文

posted @ 2015-12-20 06:41 YRB 阅读(2352) 评论(2) 推荐(0) 编辑

309. Best Time to Buy and Sell Stock with Cooldown

摘要：题目：Say you have an array for which theithelement is the price of a given stock on dayi.Design an algorithm to find the maximum profit. You may complet... 阅读全文

posted @ 2015-12-20 04:05 YRB 阅读(2381) 评论(0) 推荐(0) 编辑

2015年12月19日

308. Range Sum Query 2D - Mutable

摘要：题目：Given a 2D matrixmatrix, find the sum of the elements inside the rectangle defined by its upper left corner (row1,col1) and lower right corner (row... 阅读全文

posted @ 2015-12-19 11:00 YRB 阅读(5476) 评论(0) 推荐(1) 编辑

2015年12月18日

307. Range Sum Query - Mutable

摘要：题目: Given an integer array nums, find the sum of the elements between indices i and j (i ≤ j), inclusive. The update(i, val) function modifies nums by 阅读全文

posted @ 2015-12-18 13:02 YRB 阅读(2867) 评论(0) 推荐(1) 编辑

2015年12月17日

306. Additive Number

摘要：题目： Additive number is a string whose digits can form additive sequence. A valid additive sequence should contain at least three numbers. Except for t 阅读全文

posted @ 2015-12-17 12:44 YRB 阅读(1129) 评论(0) 推荐(0) 编辑

2015年12月16日

305. Number of Islands II

摘要：题目： A 2d grid map of m rows and n columns is initially filled with water. We may perform an addLand operation which turns the water at position (row, 阅读全文

posted @ 2015-12-16 12:15 YRB 阅读(2647) 评论(0) 推荐(0) 编辑

304. Range Sum Query 2D - Immutable

摘要：题目：Given a 2D matrixmatrix, find the sum of the elements inside the rectangle defined by its upper left corner (row1,col1) and lower right corner (row... 阅读全文

posted @ 2015-12-16 05:15 YRB 阅读(1387) 评论(0) 推荐(0) 编辑

303. Range Sum Query - Immutable

摘要：题目： Given an integer array nums, find the sum of the elements between indices i and j (i ≤ j), inclusive. Example: Note: 链接： http://leetcode.com/probl 阅读全文

posted @ 2015-12-16 04:43 YRB 阅读(1152) 评论(0) 推荐(0) 编辑

302. Smallest Rectangle Enclosing Black Pixels

摘要：题目：An image is represented by a binary matrix with0as a white pixel and1as a black pixel. The black pixels are connected, i.e., there is only one blac... 阅读全文

posted @ 2015-12-16 04:11 YRB 阅读(5519) 评论(0) 推荐(0) 编辑

2015年12月15日

301. Remove Invalid Parentheses

摘要：题目：Remove the minimum number of invalid parentheses in order to make the input string valid. Return all possible results.Note: The input string may co... 阅读全文

posted @ 2015-12-15 23:29 YRB 阅读(3377) 评论(0) 推荐(0) 编辑

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