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(2, maximumCostSubstring("adaa", "d", new ArrayList<>(Arrays.asList(-1000))));
}
@Test
public void test2() {
    assertEquals(0, maximumCostSubstring("abc", "abc", new ArrayList<>(Arrays.asList(-1,-1,-1))));
}

}