Urkupillit

import java.util.ArrayList;



public class Main {

	public static void main(String[] args) {
		IO io = new IO();
		
		int n = io.nextInt();
		int k = io.nextInt();
		
		ArrayList<Short> numbers = new ArrayList<>();
		
		for (short i = (short)n; i >= 1; i--) {
			if(k >= i-1) {
				k -= i-1;
				io.print((i)+" ");
			} else {
				numbers.add(i);
			}
		}
		
		for (int i = numbers.size()-1; i >= 0; i--) {
			io.print(numbers.get(i)+" ");
		}
		
		io.close();
	}

}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: ACCEPTED

Test 7

Group: 2

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: ACCEPTED

Test 10

Group: 2

Verdict: ACCEPTED

Test 11

Group: 3

Verdict: WRONG ANSWER

Test 12

Group: 3

Verdict: RUNTIME ERROR

Exception in thread "main" java.lang.RuntimeException: IO.nextInt: Invalid int.
	at IO.nextInt(IO.java:106)
	at Main.main(Main.java:11)

Test 13

Group: 3

Verdict: RUNTIME ERROR

Exception in thread "main" java.lang.RuntimeException: IO.nextInt: Invalid int.
	at IO.nextInt(IO.java:106)
	at Main.main(Main.java:11)

Test 14

Group: 3

Verdict: RUNTIME ERROR

Exception in thread "main" java.lang.RuntimeException: IO.nextInt: Invalid int.
	at IO.nextInt(IO.java:106)
	at Main.main(Main.java:11)

Test 15

Group: 3

Verdict: WRONG ANSWER