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RSS订阅原创 leetcode python maximum-subarray
加油Maximum-subarray题意思路python实现Maximum-subarray题意在古老的一维模式识别中,常常需要计算连续子向量的最大和,当向量全为正数的时候,问题很好解决。但是,如果向量中包含负数,是否应该包含某个负数,并期望旁边的正数会弥补它呢？例如:{6,-3,-2,7,-15,1,2,2},连续子向量的最大和为8(从第0个开始,到第3个为止)。思路必须要有变量记...
2019-06-11 16:07:44
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原创 leetcode python unique-paths（包含12）
机器人走路二题unique-paths（后面还有ii）题意思路python实现unique-paths-ii题意思路python实现unique-paths（后面还有ii）A robot is located at the top-left corner of a m x n grid (marked ‘Start’ in the diagram below).The robot can o...
2019-06-11 15:55:17
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原创 leetcode python Edit Distance
三点半Minimum Path Sum题意思路python实现Minimum Path SumGiven a m x n grid filled with non-negative numbers, find a path from top left to bottom right which minimizesthe sum of all numbers along its path.N...
2019-06-11 15:42:22
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原创 leetcode python Minimum Path Sum
慌慌的Edit Distance题意思路python实现Edit DistanceGiven two words word1 and word2, find the minimum number of steps required to convert word1 to word2. (each operation iscounted as 1 step.)You have the fol...
2019-06-11 15:09:58
127
原创 leetcode python minimum-window-substring
准备次饭minimum-window-substring题意思路python实现minimum-window-substringGiven a string S and a string T, find the minimum window in S which will contain all the characters in T in complexity O(n).For examp...
2019-06-11 11:46:26
217
原创 leetcode python decode-ways
刚开完会decode-ways题意思路python实现decode-waysA message containing letters from A-Z is being encoded to numbers using the following mapping:‘A’ -> 1‘B’ -> 2…‘Z’ -> 26Given an encoded message c...
2019-06-11 10:18:09
138
原创 leetcode python interleaving-string
准备下班interleaving-string题意思路python实现interleaving-stringGiven s1, s2, s3, find whether s3 is formed by the interleaving of s1 and s2.For example,Given:s1 =“aabcc”,s2 =“dbbca”,When s3 = “aadbbcbca...
2019-06-10 20:34:15
196
原创 leetcode python best-time-to-buy-and-sell-stock（包含123）
股票三题best-time-to-buy-and-sell-stock（后面还有ii和iii）题意思路python实现best-time-to-buy-and-sell-stock ii题意思路python实现best-time-to-buy-and-sell-stock iii题意思路python实现best-time-to-buy-and-sell-stock（后面还有ii和iii）Say...
2019-06-10 16:10:21
204
原创 leetcode python palindrome-partitioning-ii
心有困扰palindrome-partitioning-ii题意思路python实现palindrome-partitioning-iiGiven a string s, partition s such that every substring of the partition is a palindrome.Return the minimum cuts needed for a pal...
2019-06-10 14:59:49
173
原创 leetcode python Gas Station
注意效率Gas Station题意思路python实现Gas StationThere are N gas stations along a circular route, where the amount of gas at station i is gas[i].You have a car with an unlimited gas tank and it costscost[i] o...
2019-06-10 14:27:15
187
原创 leetcode python candy
按时睡觉candy题意思路暴力dfs python实现candyThere are N children standing in a line. Each child is assigned a rating value.You are giving candies to these children subjected to the following requirements:Each...
2019-06-10 11:39:31
208
原创 leetcode python word-break-ii
第一篇博客word-break-ii题意思路暴力dfs python实现dp+dfs python实现word-break-iiGiven a string s and a dictionary of words dict, add spaces in s to construct a sentence where each word is a valid dictionary word.R...
2019-06-10 10:36:24
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原创 leetcode python word-break
第一篇博客word-break题意思路python实现word-breakGiven a string s and a dictionary of words dict, determine if s can be segmented into a space-separated sequence of one or more dictionary words.For example, gi...
2019-06-06 20:24:12
206
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