Package g1501_1600.s1524_number_of_sub_arrays_with_odd_sum

Class Solution

java.lang.Object

g1501_1600.s1524_number_of_sub_arrays_with_odd_sum.Solution

public class Solution
extends Object

1524 - Number of Sub-arrays With Odd Sum\. Medium Given an array of integers `arr`, return _the number of subarrays with an **odd** sum_. Since the answer can be very large, return it modulo 109 + 7. **Example 1:** **Input:** arr = [1,3,5] **Output:** 4 **Explanation:** All subarrays are [[1],[1,3],[1,3,5],[3],[3,5],[5]] All sub-arrays sum are [1,4,9,3,8,5]. Odd sums are [1,9,3,5] so the answer is 4. **Example 2:** **Input:** arr = [2,4,6] **Output:** 0 **Explanation:** All subarrays are [[2],[2,4],[2,4,6],[4],[4,6],[6]] All sub-arrays sum are [2,6,12,4,10,6]. All sub-arrays have even sum and the answer is 0. **Example 3:** **Input:** arr = [1,2,3,4,5,6,7] **Output:** 16 **Constraints:** * 1 <= arr.length <= 105 * `1 <= arr[i] <= 100`

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int	numOfSubarrays(int[] arr)

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

numOfSubarrays

public int numOfSubarrays(int[] arr)