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Add validate-subsequence.kt #10

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Add validate-subsequence.kt #10

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25 changes: 25 additions & 0 deletions Easy/kotlin/validate-subsequence.kt
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Original file line number Diff line number Diff line change
@@ -0,0 +1,25 @@
@file:JvmName("Main")
fun main()
{
println("result is ${isValidSubsequence(intArrayOf(5,1,2,3,4),intArrayOf(1,2,3))}")
}

// O(N) time and O(1) space
fun isValidSubsequence(array: IntArray, sequence: IntArray) : Boolean
{
var i = 0
var sequenceStarted = false
for(item in array)
{
if(item == sequence[i])
{
sequenceStarted = true
i++

if(i == sequence.size) return true

} else if (sequenceStarted) return false
}

return sequenceStarted
}