complete 13265.kt 21208.kt

storage/zeta/kt/completed/21208.kt

@@ -0,0 +1,27 @@
+data class Record(
+    var counts: Int,
+    var lastModified: Int,
+)
+
+fun main() = with(System.`in`.bufferedReader()) {
+    val (n, k) = readln().split(' ').map { i -> i.toInt() }
+    val history = mutableMapOf<String, Record>()
+
+    (1..(3 * n)).forEach { i ->
+        val key = readln()
+
+        if (key in history) {
+            history[key]?.let {
+                it.counts++
+                it.lastModified = i
+            }
+        } else {
+            history[key] = Record(1, i)
+        }
+    }
+
+    history.toList().sortedWith(compareBy({ it.second.counts }, { it.second.lastModified })).takeLast(k).reversed()
+        .forEach { item ->
+            println(item.first)
+        }
+}