Max Average Stock Price Amazon OA Solution

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We have research and collected a bundle of questions which was asked in Amazon OA in the year of 2021 and 2022. Today, we are going to see another problem from amazon oa called Stock Price which was asked in 2022, this questions might be still active in some of the Amazon OA so save all the solutions and lets see how can we solve this problem.

Stock Price Amazon OA
Stock Price Amazon OA

Max Average Stock Price Amazon OA

The interns at Amazon were asked to review the company’s stock value over a period. Given the stock prices of n months, the net price change for the ith month is defined as the absolute difference between the average of stock prices for the first i months and for the remaining (n – i) months where 1≤ i <n. Note that these averages are rounded down to an integer.

Given an array of stock prices, find the month at which the net price change is minimum. If there are several such months, return the earliest month.

Note: The average of a set of integers here is defined as the sum of integers divided by the number of integers, rounded down to the nearest integer. For example, the average of [1, 2, 3, 4] is the floor of (1 + 2 + 3 + 4) / 4 = 2.5 and the floor of 2.5 is 2.

Example

stockPrice = [1, 3, 2, 3]

The minimum net price change is 0, and it occurs in the 2nd month. Return 2.

Function Description

Complete the function findEarliestMonth the editor below.

findEarliestMonth has the following parameter: int stockPrice[n]: the stock prices

Returns

int: the earliest month in which the net price change is minimum

Constraints

  • 2 ≤ n ≤ 105
  • 1 ≤ stockPrice[i] ≤ 109

Sample Input

STDIN               FUNCTION
------             ----------
5            ->    stockPrice[]
size n = 5
1            ->    stockPrice = [1, 3, 2, 4, 5]
3
2
4
5

Sample Output

2

Explanation

The net price change can be calculated as:

  • Month 1: [1] and [3, 2, 4, 5], their respective averages, rounded down = 1 and 3, net price change = 2
  • Month 2: [1, 3] and [2, 4, 5], averages = 2 and 3, net price change = 1
  • Month 3: [1, 3, 2] and [4, 5], averages = 2 and 4, net price change = 2
  • Month 4: [1, 3, 2, 4] and [5], averages = 2 and 5, net price change = 3

The minimum net price change is 1, and it occurs at month 2.

Sample Input 1

STDIN               FUNCTION
------             ----------
6            ->    stockPrice[]
size n = 6
1            ->    stockPrice = [1, 1, 1, 1, 1, 1]
1
1
1
1
1

Sample Output 1

1

Explanation

Since all the stock prices are all the same, the average is always 1 and the net price change is always 0. The earliest month this occurs is 1.

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