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Maximum Subarray Sum

MIDDLE
LuxoftN-iX

Given an array of integers and a number n, find the maximum sum of n consecutive elements in the array.

Example:

Input: arr = [1, 2, 5, 2, 8, 1, 5], n = 2
Output: 10
Explanation: 2 + 8 = 10

Examples:

Input 1:{"arr":[1,2,5,2,8,1,5],"n":2}
Output 1:10
Input 2:{"arr":[1,2,5,2,8,1,5],"n":4}
Output 2:17

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