@@ -0,0 +1,578 @@
+package _20160827_2nd_contest;%0A%0Apublic class FindTheDifference %7B%0A    public char findTheDifference(String s, String t) %7B%0A        int%5B%5D counts = new int%5B128%5D;%0A        char%5B%5D schars = s.toCharArray();%0A        char%5B%5D tchars = t.toCharArray();%0A        for(int i = 0; i %3C schars.length; i++)%7B%0A            counts%5Bschars%5Bi%5D%5D++;%0A        %7D%0A        for(int i = 0; i %3C tchars.length; i++)%7B%0A            counts%5Btchars%5Bi%5D%5D--;%0A        %7D%0A        char result = 'a';%0A        for(int i = 0; i %3C 128; i++)%7B%0A            if(counts%5Bi%5D != 0) result = (char) i;%0A        %7D%0A        return result;%0A    %7D%0A%7D%0A

find the difference