class Math {
    static Array twoToThe;
    
    /** Initializes the library. */
    function void init() {
        var int i;
        let twoToThe = Array.new(16);
        let twoToThe[0] = 1;
        let i = 1;
        while (i < 16) {
            let twoToThe[i] = twoToThe[i-1] + twoToThe[i-1];
            let i = i + 1;
        }
        return;
    }
    
    function int multiply(int x, int y) {
        var int sum, shiftedX;
        let sum = 0;
        let shiftedX = x;
        // Implementation details...
        return sum;
    }
}