Card Trick

import java.util.ArrayList;
import java.util.Arrays;

public class Kilpalaatikko {
    
    public static void main(String[] args) {
        IO io = new IO();
        int n = io.nextInt();
        boolean[] checked = new boolean[n];
        int[] answer = new int[n];
        int x = 0;
        int y = 0;
        int z = 1;
        loop:
        while (true) {
            if(z == n+1){
                break;
            }
             if (x >= n) {
                x = 0;
            }
            if (answer[x] != 0) {
                x++;
                continue;
            }
            if (y == z) {
                answer[x] = z;
                z++;
                y = 0;
                checked[x] = true;
                x++;
                continue;
            }
            y++;
            x++;
           
            
            
        }
        for (int i = 0; i < n; i++) {
            io.print(answer[i]);
        }
//        io.print("");
        io.close(); // TÄYTYY KUTSUA LOPUKSI, muuten tuloste voi jäädä kirjoittamatta

    }
    
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: WRONG ANSWER

Test 3

Verdict: WRONG ANSWER

Test 4

Verdict: WRONG ANSWER

Test 5

Verdict: WRONG ANSWER

Test 6

Verdict: WRONG ANSWER

Test 7

Verdict: WRONG ANSWER

Test 8

Verdict: WRONG ANSWER

Test 9

Verdict: WRONG ANSWER

Test 10

Verdict: WRONG ANSWER

Test 11

Verdict: WRONG ANSWER

Test 12

Verdict: WRONG ANSWER

Test 13

Verdict: WRONG ANSWER