class AdditionMagic {

    // 1. Concatenates an integer and a String
    public String add(int a, String b) {
        return a + b;
    }

    // 2. Adds two doubles and rounds to 2 decimal places
    public String add(double a, double b) {
        double sum = a + b;
        // Multiply by 100, round to nearest whole number, then divide by 100.0
        double roundedSum = Math.round(sum * 100.0) / 100.0;
        return String.valueOf(roundedSum);
    }

    // 3. Concatenates two Strings
    public String add(String a, String b) {
        return a + b;
    }
}