public class Solution { public static void main(String[] args) { Scanner sc = new Scanner (System.in); int n = sc.nextInt(); TreeSet t = new TreeSet(); for (int i = 0; i < n; i++) { int value; int command = sc.nextInt(); %3D if (command == 1) { value = sc.nextInt(); t.add (value); } else if (command == 2) { value = sc.nextInt(); t.remove(value); } else if (command == 3) { System.out.println(t.first()); } } }

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