Create 0057-insert-interval.kt

kotlin/0057-insert-interval.kt

@@ -0,0 +1,28 @@
+class Solution {
+    fun insert(intervals: Array<IntArray>, newInterval: IntArray): Array<IntArray> {
+        val res = ArrayList<IntArray>()
+        var added = false
+        var index = 0
+        for(i in 0 until intervals.size){
+            val interval = intervals[i]
+            if(newInterval[1] < interval[0]){ //no more overlapping intervals
+                res.add(newInterval)
+                added = true
+                break
+            }else if(newInterval[0] > interval[1]){ //non overlapping
+                res.add(interval)
+            }else{ //overlapping, update the newinterval accordingly
+                newInterval[0] = minOf(newInterval[0],interval[0])
+                newInterval[1] = maxOf(newInterval[1],interval[1])
+            }
+            index++
+        }
+        if(index < intervals.size){ // add all the leftover intervals (after the break)
+            for(i in index until intervals.size)
+                res.add(intervals[i])
+        }
+        if(added == false) // takes care of (1) Empty intervals array or 1-sized array with overlapping newinterval
+            res.add(newInterval)
+        return res.toTypedArray()
+    }
+}