Lehmät

import java.util.ArrayList;
import java.util.Scanner;

/**
 *
 * @author NM
 */
public class Lehmat {

    public static void main(String[] args) {
        Scanner lukija = new Scanner(System.in);
        int korkeus = lukija.nextInt();
        int leveys = lukija.nextInt();
        ArrayList<String> aitaus = new ArrayList<>();
        int lehmiaAitauksessa = 0;

        for (int i = 0; i < korkeus; i++) {
            String x = lukija.nextLine();
            if (x.length() != leveys) {
                i--;
                continue;
            }
            aitaus.add(x);
        }

        boolean aidanSisalla = false;
        for (String rivi : aitaus) {
            for (int i = 0; i < rivi.length(); i++) {
                if (rivi.substring(i, i + 1).equals("*")) {
                    aidanSisalla = !aidanSisalla;
                }
                if (aidanSisalla == true) {
                    if (rivi.substring(i, i + 1).equals("@")) {
                        lehmiaAitauksessa++;
                    }
                }
            }
            aidanSisalla = false;
        }
        System.out.println(lehmiaAitauksessa);
    }

}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 1, 2

Verdict: ACCEPTED

Test 3

Group: 1, 2

Verdict: ACCEPTED

Test 4

Group: 1, 2

Verdict: WRONG ANSWER

Test 5

Group: 1, 2

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: WRONG ANSWER