Package g0901_1000.s0907_sum_of_subarray_minimums

Class Solution

java.lang.Object

g0901_1000.s0907_sum_of_subarray_minimums.Solution

public class Solution
extends Object

907 - Sum of Subarray Minimums\. Medium Given an array of integers arr, find the sum of `min(b)`, where `b` ranges over every (contiguous) subarray of `arr`. Since the answer may be large, return the answer **modulo** 109 + 7. **Example 1:** **Input:** arr = [3,1,2,4] **Output:** 17 **Explanation:** Subarrays are [3], [1], [2], [4], [3,1], [1,2], [2,4], [3,1,2], [1,2,4], [3,1,2,4]. Minimums are 3, 1, 2, 4, 1, 1, 2, 1, 1, 1. Sum is 17. **Example 2:** **Input:** arr = [11,81,94,43,3] **Output:** 444 **Constraints:** * 1 <= arr.length <= 3 * 104 * 1 <= arr[i] <= 3 * 104

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int	sumSubarrayMins(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

sumSubarrayMins

public int sumSubarrayMins(int[] arr)