Urkupillit

public class Main {

	public static void main(String[] args) {
		IO io = new IO();
		
		int n = io.nextInt();
		long k = io.nextLong();
		
		boolean[] numbers = new boolean[n];
		
		for (int i = n; i >= 1; i--) {
			if(k >= i-1) {
				k -= i-1;
				numbers[i-1] = true;
				io.print((i)+" ");
			}
		}
		
		for (int i = 0; i < n; i++) {
			if(!numbers[i]) io.print((i+1)+" ");
		}
		
		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: ACCEPTED

Test 12

Group: 3

Verdict: ACCEPTED

Test 13

Group: 3

Verdict: ACCEPTED

Test 14

Group: 3

Verdict: ACCEPTED

Test 15

Group: 3

Verdict: ACCEPTED