Competitive/Collaborative Programming Class

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\f0\fs26 \cf2 \cb3 /*\
  UVa 619 - Numerically Speaking\
  Randall Head \
*/\
\
import java.util.Scanner;\
import java.math.BigInteger;\
\
class Main \{\
  static final BigInteger TWENTY_SIX = BigInteger.valueOf(26);\
\
  public static void main(String[] args) \{\
    Scanner sc = new Scanner(System.in);\
    while (true) \{\
      if (sc.hasNextBigInteger()) \{\
        BigInteger n = sc.nextBigInteger();\
        String s = convertToString(n);\
        System.out.printf("%-22s%s%n", s, getNumberToBePrinted(n));\
      \}\
      else if (sc.hasNext()) \{\
        String s = sc.next();\
        if (s.equals("*"))\
          break;\
        BigInteger n = convertToNumber(s);\
        System.out.printf("%-22s%s%n", s, getNumberToBePrinted(n));\
      \}\
    \}\
  \}\
\
  static String convertToString(BigInteger n) \{\
    StringBuilder sb = new StringBuilder();\
    do \{\
      sb.append((char)('a' +\
        n.subtract(BigInteger.ONE).mod(TWENTY_SIX).intValue()));\
      n = n.subtract(BigInteger.ONE).divide(TWENTY_SIX);\
    \} while (n.compareTo(BigInteger.ZERO) != 0);\
    sb.reverse();\
    return sb.toString();\
  \}\
\
  static BigInteger convertToNumber(String s) \{\
    BigInteger n = BigInteger.ZERO;\
    for (int i = 0; i < s.length(); i++) \{\
      n = n.multiply(TWENTY_SIX);\
      n = n.add(BigInteger.valueOf((int)(s.charAt(i) - 'a' + 1)));\
    \}\
    return n;\
  \}\
\
  static String getNumberToBePrinted(BigInteger n) \{\
    String s = n.toString();\
    StringBuilder sb = new StringBuilder();\
    for (int i = s.length() - 1, j = 0; i >= 0; i--, j++) \{\
      sb.append(s.charAt(i));\
      if (i > 0 && (j % 3) == 2)\
        sb.append(',');\
    \}\
    sb.reverse();\
    return sb.toString();\
  \}\
\}\
\
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