54 lines
1.9 KiB
Kotlin
54 lines
1.9 KiB
Kotlin
/*
|
|
* MIT License
|
|
*
|
|
* Copyright (c) 2019 norangebit
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, tryMerge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in all
|
|
* copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*
|
|
*/
|
|
|
|
package it.norangeb.algorithms.exercises
|
|
|
|
object PrefixAverage {
|
|
fun prefixAverage(arrayIn: IntArray): IntArray {
|
|
|
|
val arrayOut = IntArray(arrayIn.size)
|
|
var currentSum = 0
|
|
|
|
for (i in 0 until arrayIn.size) {
|
|
currentSum += arrayIn[i]
|
|
arrayOut[i] = currentSum / (i + 1)
|
|
}
|
|
|
|
return arrayOut
|
|
}
|
|
|
|
fun recursivePrefixAverage(arrayIn: IntArray, position: Int = 0, acc: Int = 0): IntArray {
|
|
return when (position) {
|
|
arrayIn.size -> IntArray(arrayIn.size)
|
|
else -> {
|
|
val newAcc = arrayIn[position] + acc
|
|
val array = recursivePrefixAverage(arrayIn, position + 1, newAcc)
|
|
array[position] = newAcc / (position + 1)
|
|
array
|
|
}
|
|
}
|
|
}
|
|
}
|