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).
Note:
Bonus point if you are able to do this using only O(n) extra space, wheren is the total number of rows in the triangle.
思路:
该结点能达到的最小值等于它的两个父结点能达到的最小值中较......
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