Package g1701_1800.s1712_ways_to_split_array_into_three_subarrays

Class Solution

java.lang.Object
g1701_1800.s1712_ways_to_split_array_into_three_subarrays.Solution
public class Solution extends java.lang.Object
1712 - Ways to Split Array Into Three Subarrays.

Medium

A split of an integer array is good if:

  • The array is split into three non-empty contiguous subarrays - named left, mid, right respectively from left to right.
  • The sum of the elements in left is less than or equal to the sum of the elements in mid, and the sum of the elements in mid is less than or equal to the sum of the elements in right.

Given nums, an array of non-negative integers, return the number of good ways to split nums. As the number may be too large, return it modulo 109 + 7.

Example 1:

Input: nums = [1,1,1]

Output: 1

Explanation: The only good way to split nums is [1] [1] [1].

Example 2:

Input: nums = [1,2,2,2,5,0]

Output: 3

Explanation: There are three good ways of splitting nums:

[1] [2] [2,2,5,0]

[1] [2,2] [2,5,0]

[1,2] [2,2] [5,0]

Example 3:

Input: nums = [3,2,1]

Output: 0

Explanation: There is no good way to split nums.

Constraints:

  • 3 <= nums.length <= 105
  • 0 <= nums[i] <= 104

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    waysToSplit(int[] nums)
     

    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

    • waysToSplit

      public int waysToSplit(int[] nums)