Package g0101_0200.s0120_triangle

Class Solution

java.lang.Object

g0101_0200.s0120_triangle.Solution

public class Solution
extends Object

120 - Triangle.

Medium

Given a triangle array, return the minimum path sum from top to bottom.

For each step, you may move to an adjacent number of the row below. More formally, if you are on index i on the current row, you may move to either index i or index i + 1 on the next row.

Example 1:

Input: triangle = [[2],[3,4],[6,5,7],[4,1,8,3]]

Output: 11

Explanation:

 The triangle looks like:
     2
    3 4
   6 5 7
  4 1 8 3
  The minimum path sum from top to bottom is 2 + 3 + 5 + 1 = 11 (underlined above). 

Example 2:

Input: triangle = [[-10]]

Output: -10

Constraints:

• 1 <= triangle.length <= 200
• triangle[0].length == 1
• triangle[i].length == triangle[i - 1].length + 1
• -104 <= triangle[i][j] <= 104

Follow up: Could you do this using only O(n) extra space, where n is the total number of rows in the triangle?

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int	minimumTotal(List<List<Integer>> triangle)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Solution

public Solution()

Method Details

minimumTotal

public int minimumTotal(List<List<Integer>> triangle)