import static org.junit.jupiter.api.Assertions.*;
import org.junit.jupiter.api.Test;
import java.util.List;
import java.util.Arrays;
import java.util.ArrayList;
public class Main {
    //Program start
    
    //Program end

    @Test
public void test1() {
    assertEquals(6, numberOfGoodPaths(new ArrayList<>(Arrays.asList(1,3,2,1,3)), new ArrayList<>(Arrays.asList(new ArrayList<>(Arrays.asList(0,1)),new ArrayList<>(Arrays.asList(0,2)),new ArrayList<>(Arrays.asList(2,3)),new ArrayList<>(Arrays.asList(2,4))))));
}
@Test
public void test2() {
    assertEquals(7, numberOfGoodPaths(new ArrayList<>(Arrays.asList(1,1,2,2,3)), new ArrayList<>(Arrays.asList(new ArrayList<>(Arrays.asList(0,1)),new ArrayList<>(Arrays.asList(1,2)),new ArrayList<>(Arrays.asList(2,3)),new ArrayList<>(Arrays.asList(2,4))))));
}
@Test
public void test3() {
    assertEquals(1, numberOfGoodPaths(new ArrayList<>(Arrays.asList(1)), []));
}

}