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Topic

dynamic programming

A collection of 10 issues

Word Break II

Question Given 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. Return all such possible sentences. Example Gieve s = lintcode, dict = ["de", "ding", "co", "code", "lint"]. A solution is ["lint code", "lint co de"

Word Break

Question http://www.lintcode.com/en/problem/word-break/ Given a string s and a dictionary of words dict, determine if s can be break into a space-separated sequence of one or more dictionary words. Example Given s = "lintcode", dict = ["lint", "code"]. Return true because "lintcode" can be break as "lint

Unique Paths III

Question http://www.lintcode.com/en/problem/unique-paths-iii/ Follow up for "Unique Paths II": https://acm.errong.win/uniquepathsii/ Now each grid contains a value, so each path also has a value. Find the sum of all the unique values paths. Example For example, [ [1,1,2], [1,2,3]

Unique Paths II

Question http://www.lintcode.com/en/problem/unique-paths-ii/ Follow up for "Unique Paths": Now consider if some obstacles are added to the grids. How many unique paths would there be? An obstacle and empty space is marked as 1 and 0 respectively in the grid. Example For example, There is

Unique Paths

Question http://www.lintcode.com/en/problem/unique-paths/ A robot is located at the top-left corner of a m x n grid. The robot can only move either down or right at any point in time. The robot is trying to reach the bottom-right corner of the grid. How many

Maximum Subarray III

Question: http://www.lintcode.com/en/problem/maximum-subarray-iii/ Given an array of integers and a number k, find k non-overlapping subarrays which have the largest sum. The number in each subarray should be contiguous. Return the largest sum. Answer localMax[i][j], means the maximum sum we can get while

Wildcard Matching

Question: http://www.lintcode.com/en/problem/wildcard-matching/ Implement wildcard pattern matching with support for '?' and '*'. '?' Matches any single character. '*' Matches any sequence of characters (including the empty sequence). The matching should cover the entire input string (not partial). Answer: class Solution

House Robber II

Question: http://www.lintcode.com/en/problem/house-robber-ii/ After robbing those houses on that street, the thief has found himself a new place for his thievery so that he will not get too much attention. This time, all houses at this place are arranged in a circle. That means the

House Robber

Question: http://www.lintcode.com/en/problem/house-robber You are a professional robber planning to rob houses along a street. Each house has a certain amount of money stashed, the only constraint stopping you from robbing each of them is that adjacent houses have security system connected and it will

Maximal Square

Question: http://www.lintcode.com/en/problem/maximal-square/ Given a 2D binary matrix filled with 0's and 1's, find the largest square containing all 1's and return its area. Example For example, given the following matrix: 1 0 1 0 0 1 0 1 1 1 1 1 1 1