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(15, minCostToEqualizeArray(new ArrayList<>(Arrays.asList(4,1)), 5, 2));
}
@Test
public void test2() {
    assertEquals(6, minCostToEqualizeArray(new ArrayList<>(Arrays.asList(2,3,3,3,5)), 2, 1));
}
@Test
public void test3() {
    assertEquals(4, minCostToEqualizeArray(new ArrayList<>(Arrays.asList(3,5,3)), 1, 3));
}

}