Solution for "Viral Advertising" at Hackerrank

sol.java

    // Complete the viralAdvertising function below.
    static int viralAdvertising(int n) {
        int cummulative = 0;
        int shared = 5;
        for (int day = 1; day <= n; day++) {
            int like = shared / 2;
            shared = like * 3;
            cummulative += like;
        }

        return cummulative;
    }