Created
February 15, 2019 11:19
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CountingSort
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| /** | |
| * Counting Sort assumes every element of input array was inside [0,k] | |
| */ | |
| object CountingSort { | |
| fun sort(input: Array<Int>, upperLimit: Int): Array<Int> { | |
| val C = IntArray(upperLimit + 1) { 0 } | |
| val output = Array<Int>(input.size) { 0 } | |
| input.forEach { element -> | |
| C[element]++ | |
| } | |
| for (i in 1..upperLimit) { | |
| C[i] = C[i] + C[i - 1] | |
| } | |
| for (i in output.size - 1 downTo 0) { | |
| output[C[input[i]]-1] = input[i] | |
| C[input[i]]-- | |
| } | |
| return output | |
| } | |
| } |
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