Simplified Sudoku

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//package a5;

import java.util.Scanner;

/**
 *
 * @author reetta
 */
public class A5 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        Scanner s = new Scanner(System.in);
        int n = s.nextInt();
        //int[][] a = new int[n][n];
        
        boolean[][] rows = new boolean[n][n+1]; //i
        boolean[][] cols = new boolean[n][n+1]; //j
        
        for(int i = 0; i < n; i++){
            for(int j = 0; j <n; j++){
                rows[i][j] = false;
                cols[i][j] = false;
            }
        }
        
        for (int i = 0; i < n; i++) {
            for(int j = 0; j < n; j++){
                int val = s.nextInt();
                //System.out.println("i: " + i + " j: " + j + " val: " + val);
                if(rows[i][val]){
                    System.out.println("NO");
                    return;
                }else{
                    rows[i][val] = true;
                }
                if(cols[j][val]){
                    System.out.println("NO");
                    return;
                }else{
                    cols[j][val] = true;
                }
                
            }
        }
        
        System.out.println("YES");
        
        
    }
    
    
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED