melody96313的博客

问题描述A sequence of numbers is called awiggle sequenceif the differences between successive numbers strictly alternate between positive and negative. The first difference (if one exists) may be eith...

问题描述：Given a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers on the row below.For example, given the following triangle[ [2], [3,4],...

问题描述Given two wordsword1andword2, find the minimum number of operations required to convertword1toword2.You have the following 3 operations permitted on a word:Insert a character Delete a...

Given a 2d grid map of'1's (land) and'0's (water), count the number of islands. An island is surrounded by water and is formed by connecting adjacent lands horizontally or vertically. You may assume...

问题描述：Givennballoons, indexed from0ton-1. Each balloon is painted with a number on it represented by arraynums. You are asked to burst all the balloons. If the you burst ballooniyou will get...