[leetcode DP]120. Triangle

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],

   [6,5,7],

  [4,1,8,3]

]

The minimum path sum from top to bottom is 11 (i.e., 2 + 3 + 5 + 1 = 11).

从下到上，求每一层每个位置可能的最小的数，套步骤：1，确定最优子问题，2，确定重叠的子问题，3，备忘

 class Solution(object):

     def minimumTotal(self, triangle):

         for i in range(len(triangle)-2,-1,-1):

             for j in range(0,len(triangle[i])):

                 triangle[i][j] += min(triangle[i+1][j],triangle[i+1][j+1])

         return triangle[0][0]

巴特西

[leetcode DP]120. Triangle

最新文章

热门文章