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(6, minimumCost(Arrays.asList(1,2,3,4,5)));
}
@Test
public void test2() {
    assertEquals(11, minimumCost(Arrays.asList(10,12,13,14,15)));
}
@Test
public void test3() {
    assertEquals(22, minimumCost(Arrays.asList(22,33,22,33,22)));
}

}