VMware coding Challenge: Coin Toss Betting

     static int CoinTossEndAmount(int betAmount, String coinTossResults) {
         if (betAmount <=0 || coinTossResults.length() == 0) return betAmount;
         long Amount = betAmount;
         long onebet = 1;
         for (int i=0; i<coinTossResults.length(); i++) {
             if (coinTossResults.charAt(i) == 'H') {
                 Amount += onebet;
                 onebet *= 2;
             }
             else {
                 Amount -= onebet;
                 onebet /= 2;
             }
             if (Amount < onebet) return 0;
             if (onebet < 1) onebet = 1;
         }
         return (int)Amount;
     }