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64. Minimum Path Sum
Given a m x n grid filled with non-negative numbers, find a path from top left to bottom right which minimizes the sum of all numbers along its path.Note: You can only move either down or right at any...原创 2017-11-06 15:12:21 · 154 阅读 · 0 评论 -
Maximum Subarray
Find the contiguous subarray within an array (containing at least one number) which has the largest sum.For example, given the array [-2,1,-3,4,-1,2,1,-5,4],the contiguous subarray [4,-1,2,1] has the ...原创 2017-10-26 13:29:02 · 158 阅读 · 0 评论 -
Climbing Stairs
You are climbing a stair case. It takes n steps to reach to the top.Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb to the top?Note: Given n will be a positive int...原创 2017-10-26 13:44:43 · 158 阅读 · 0 评论