33 lines
733 B
Kotlin
33 lines
733 B
Kotlin
// version 1.1.2
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fun <T> ncs(a: Array<T>) {
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fun generate(m: Int, k: Int, c: IntArray) {
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if (k == m) {
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if (c[m - 1] != c[0] + m - 1) {
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for (i in 0 until m) print("${a[c[i]]} ")
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println()
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}
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}
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else {
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for (j in 0 until a.size) {
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if (k == 0 || j > c[k - 1]) {
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c[k] = j
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generate(m, k + 1, c)
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}
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}
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}
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}
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for (m in 2 until a.size) {
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val c = IntArray(m)
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generate(m, 0, c)
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}
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}
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fun main(args: Array<String>) {
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val a = arrayOf(1, 2, 3, 4)
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ncs(a)
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println()
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val ca = arrayOf('a', 'b', 'c', 'd', 'e')
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ncs(ca)
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}
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