fn abs(x: Int) Int {
    if x < 0 {
        return -x;
    }
    return x;
}

fn fabs(x: Float) Float {
    if x < 0.0 {
        return -x;
    }
    return x;
}

fn max(x: Int, y: Int) Int {
    if x > y {
        return x;
    }
    return y;
}

fn min(x: Int, y: Int) Int {
    if x < y {
        return x;
    }
    return y;
}

fn fmax(x: Float, y: Float) Float {
    if x > y {
        return x;
    }
    return y;
}

fn fmin(x: Float, y: Float) Float {
    if x < y {
        return x;
    }
    return y;
}

fn pow(x: Float, y: Float) Float {
    var power: Float = x;
    while y > 1.0 {
        x = power*x;
	y = y-1.0;
    }
    return x;
}

fn floor(x: Float) Int{
	return as_int(x - fabs(x % 1.0));
}

fn ceil(x: Float) Int {
    if x < 0.0 {
        return floor(x) - 1;
    }
    return floor(x) + 1;
}

fn round(x: Float) Int {
    var ret: Int = floor(x);
    if fabs(x % 1.0) >= 0.5 {
        ret = ceil(x);
    }
    return ret;
}