package modern.challenge;

import java.util.Objects;

public class Function {

    private static final int X_UPPER_BOUND = 11;
    private static final int Y_UPPER_BOUND = 16;

    private final int x;

    public Function(int x) {
        this.x = Objects.checkIndex(x, X_UPPER_BOUND);
    }

    public int xMinusY(int y) {
        Objects.checkIndex(y, x);

        return x - y;
    }

    public static int oneMinusY(int y) {
        Objects.checkIndex(y, Y_UPPER_BOUND);

        return 1 - y;
    }
}