kotlin backtrack

backtrack.kt

class CombineHandler {
    var subsetArray: IntArray
    val SIZE: Int = 5
    init {
        subsetArray = IntArray(SIZE)
    }

    fun backtrack (n: Int,size: Int)  {
        if (n == SIZE) {
            for (i in 0..size - 1) {
                print("${subsetArray[i]} ")
            }
            println()
            return
        }

        subsetArray[size] = n
        backtrack(n + 1,size + 1)
        backtrack(n + 1,size)
    }
}

fun main () {
  backtrack(0,0)
}