Create 0448-find-all-numbers-disappeared-in-an-array.kt

Author: a93a

kotlin/0448-find-all-numbers-disappeared-in-an-array.kt

@@ -0,0 +1,13 @@
+class Solution {
+    fun findDisappearedNumbers(nums: IntArray): List<Int> {
+        val res = ArrayList<Int>()
+        for(i in nums.indices){
+            val num = Math.abs(nums[i])
+            nums[num-1] = Math.abs(nums[num-1]) * -1
+        }
+        for((i,v) in nums.withIndex()){
+            if(v > 0) res.add(i+1)
+        }
+        return res
+    }
+}