now it work only with non negative integer list
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/*
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* MIT License
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*
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* Copyright (c) 2019 norangebit
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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package it.norangeb.algorithms.exercises
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object OrderedListSorter {
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fun sort(vararg lists: List<Int>): List<Int> {
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val bias = lists.map { it.first() }.sorted().first()
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val upperBound = lists.map { it.last() }.sorted().last()
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val bucket = Array(upperBound - bias + 1) { 0 }
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lists.forEach {
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it.forEach {
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bucket[it - bias] += 1
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}
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}
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bucket.forEachIndexed { index, _ ->
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if (index == 0)
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return@forEachIndexed
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bucket[index] += bucket[index - 1]
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}
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val outList = arrayOfNulls<Int>(bucket[upperBound - bias])
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lists.forEach {
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it.forEach {
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outList[bucket[it - bias] - 1] = it
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bucket[it - bias] -= 1
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}
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}
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return (outList as Array<Int>).toList()
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}
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}
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@ -0,0 +1,47 @@
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/*
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* MIT License
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*
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* Copyright (c) 2019 norangebit
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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package it.norangeb.algorithms.exercises
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import org.amshove.kluent.`should equal`
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import org.junit.Test
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class OrderedListSorterTest {
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@Test
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fun test() {
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val out = OrderedListSorter.sort(
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listOf(1, 5, 9, 10, 12, 14, 15, 15, 20, 25, 29, 31, 35, 37, 43, 48),
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listOf(2, 7, 12, 21, 23, 33, 35, 43, 45),
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listOf(3, 7, 9, 12, 14, 16, 27, 28, 37, 39, 45, 45, 46, 50),
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listOf(1, 8, 9, 11, 13, 21, 25, 33, 34, 41, 47, 48)
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)
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out `should equal` listOf(1, 1, 2, 3, 5, 7, 7, 8, 9, 9, 9, 10, 11, 12,
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12, 12, 13, 14, 14, 15, 15, 16, 20, 21, 21, 23, 25, 25, 27, 28, 29,
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31, 33, 33, 34, 35, 35, 37, 37, 39, 41, 43, 43, 45, 45, 45, 46, 47,
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48, 48, 50)
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}
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}
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