Class Solution
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- g1501_1600.s1588_sum_of_all_odd_length_subarrays.Solution
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public class Solution extends Object
1588 - Sum of All Odd Length Subarrays.Easy
Given an array of positive integers
arr
, calculate the sum of all possible odd-length subarrays.A subarray is a contiguous subsequence of the array.
Return _the sum of all odd-length subarrays of _
arr
.Example 1:
Input: arr = [1,4,2,5,3]
Output: 58
Explanation: The odd-length subarrays of arr and their sums are:
[1] = 1
[4] = 4
[2] = 2
[5] = 5
[3] = 3
[1,4,2] = 7
[4,2,5] = 11
[2,5,3] = 10
[1,4,2,5,3] = 15
If we add all these together we get 1 + 4 + 2 + 5 + 3 + 7 + 11 + 10 + 15 = 58
Example 2:
Input: arr = [1,2]
Output: 3
Explanation: There are only 2 subarrays of odd length, [1] and [2]. Their sum is 3.
Example 3:
Input: arr = [10,11,12]
Output: 66
Constraints:
1 <= arr.length <= 100
1 <= arr[i] <= 1000
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Constructor Summary
Constructors Constructor Description Solution()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description int
sumOddLengthSubarrays(int[] arr)
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