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

    //Program end

    @Test
public void test1() {
    assertEquals(13, maximumSumOfHeights(Arrays.asList(5,3,4,1,1)));
}
@Test
public void test2() {
    assertEquals(22, maximumSumOfHeights(Arrays.asList(6,5,3,9,2,7)));
}
@Test
public void test3() {
    assertEquals(18, maximumSumOfHeights(Arrays.asList(3,2,5,5,2,3)));
}

}