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()); } } }

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question
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Please explain the code for me.

public class Solution {
public static void main(String[] args) {
Scanner sc = new Scanner (System.in);
int n = sc.nextInt();
TreeSet<Integer> t = new TreeSet<Integer> ();
for (int i = 0; i < n; i++) {
int value;
int command
sc.nextInt();
== 1) {
if (command
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());
}
%3%3D
}
}
}
Transcribed Image Text:public class Solution { public static void main(String[] args) { Scanner sc = new Scanner (System.in); int n = sc.nextInt(); TreeSet<Integer> t = new TreeSet<Integer> (); for (int i = 0; i < n; i++) { int value; int command sc.nextInt(); == 1) { if (command 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()); } %3%3D } } }
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