Merge pull request neetcode-gh#988 from MaratKhakim/66-Plus-One-kt

Kotlin: 66. Plus One

Author: Ahmad-A0

kotlin/66-Plus-One.kt

@@ -0,0 +1,14 @@
+class Solution {
+    fun plusOne(digits: IntArray): IntArray {
+        for (i in digits.size-1 downTo 0) {
+            digits[i] += 1
+
+            if (digits[i] <= 9)
+                return digits
+
+            digits[i] = 0
+        }
+
+        return IntArray(digits.size+1).also{ it[0] = 1 }
+    }
+}