private fun findSubs(arr: IntArray, sum: Int): List<IntArray> {
val result = mutableListOf<IntArray>()
var start = 0
var end = 0
var product = 1
while (start <= end && end < arr.size) {
val sublist = arr.slice(start..end).toIntArray()
product *= arr[end]
if (product < sum) {
result.add(sublist)
}
if (end < arr.size - 1) {
end++
} else {
product = 1
start++
end = start
}
}
return result
}