Sudoku

import java.util.Scanner;
 
 
public class Main {
	
	public static void ratkaise(int[][] sudoku) {
		int y = 1;
		int x = 0;
		while(y < 9) {
				
				while(true) {
					boolean kay = true;
				
					sudoku[y][x]++;
					if(sudoku[y][x] == 10) {
						sudoku[y][x] = 0;
						if(x == 0) {
							y--;
							x = 8;
						} else {
							x--;
						}
						continue;
					}
					
					for (int i = 0; i < 9; i++) {
						if(sudoku[y][i] == sudoku[y][x] && i != x) {
							kay = false;
							break;
						}
					}
					for (int i = 0; i < 9; i++) {
						if(!kay)break;
						if(sudoku[i][x] == sudoku[y][x] && i != y) {
							kay = false;
							break;
						}
					}
					for (int i = 0; i < 9; i++) {
						if(!kay)break;
						int x1 = i%3 + 3 * (x/3);
						int y1 = i/3 + 3 * (y/3);
						
						if(sudoku[y1][x1] == sudoku[y][x] && (y1 != y || x1 != x)) {
							kay = false;
						}
						
					}
					if(kay)break;
				}
				
				x++;
				if(x == 9) {
					x = 0;
					y++;
				}
			}
		
	}
	
 
	public static void main(String[] args) {
		Scanner lukija = new Scanner(System.in);
		String rivi = lukija.nextLine();
		int[][] sudoku = new int[9][9];
		for (int i = 0; i < 9; i++) {
			sudoku[0][i] = Integer.parseInt(String.valueOf(rivi.charAt(i)));
		}
		ratkaise(sudoku);
		for (int i = 0; i < 9; i++) {
			for (int j = 0; j < 9; j++) {
				System.out.print(sudoku[i][j]);
			}
			System.out.println();
		}
		lukija.close();
	}
 
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED