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(false, isGood(new ArrayList<>(Arrays.asList(2, 1, 3))));
}
@Test
public void test2() {
    assertEquals(true, isGood(new ArrayList<>(Arrays.asList(1, 3, 3, 2))));
}
@Test
public void test3() {
    assertEquals(true, isGood(new ArrayList<>(Arrays.asList(1, 1))));
}
@Test
public void test4() {
    assertEquals(false, isGood(new ArrayList<>(Arrays.asList(3, 4, 4, 1, 2, 1))));
}

}