kt: add «3396. Minimum Number of Operations to Make Elements in Array Distinct»

URL:	https://leetcode.com/problems/minimum-number-of-operations-to-make-elements-in-array-distinct/
Signed-off-by: Matej Focko <me@mfocko.xyz>

kt/minimum-number-of-operations-to-make-elements-in-array-distinct.kt

@@ -0,0 +1,15 @@
+class Solution {
+    fun minimumOperations(nums: IntArray): Int =
+        BooleanArray(101).let { seen ->
+            for (num in nums.withIndex().reversed()) {
+                when (seen[num.value]) {
+                    true -> {
+                        return num.index / 3 + 1
+                    }
+                    else -> seen[num.value] = true
+                }
+            }
+
+            0
+        }
+}