public String solve (String s, String t) { int sLen = s.length() - 1, tLen = t.length() - 1, carry = 0; StringBuilder result = new StringBuilder(); while(sLen >= 0 || tLen >= 0 || carry > 0){ int sNum = sLen >= 0 ? s.charAt(sLen --) - '0' : 0; int tNum = tLen >= 0 ? t.charAt(tLen --) ...
