g1101_1200.s1191_k_concatenation_maximum_sum

Class Solution

java.lang.Object

g1101_1200.s1191_k_concatenation_maximum_sum.Solution

public class Solution
extends Object

1191 - K-Concatenation Maximum Sum.

Medium

Given an integer array arr and an integer k, modify the array by repeating it k times.

For example, if arr = [1, 2] and k = 3 then the modified array will be [1, 2, 1, 2, 1, 2].

Return the maximum sub-array sum in the modified array. Note that the length of the sub-array can be 0 and its sum in that case is 0.

As the answer can be very large, return the answer modulo 109 + 7.

Example 1:

Input: arr = [1,2], k = 3

Output: 9

Example 2:

Input: arr = [1,-2,1], k = 5

Output: 2

Example 3:

Input: arr = [-1,-2], k = 7

Output: 0

Constraints:

• 1 <= arr.length <= 105
• 1 <= k <= 105
• -104 <= arr[i] <= 104

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
int	kConcatenationMaxSum(int[] arr, int k)

Methods inherited from class java.lang.Object

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

Constructor Detail

Solution

public Solution()

Method Detail

kConcatenationMaxSum

public int kConcatenationMaxSum(int[] arr,
                                int k)