Amazing Grace

Problem StatementMy solution/** * @(#)LetterInterchange.java * * * @author foo bar * @version 1.00 2007/9/4 */public class LetterInterchange{    /**     * Method interchangeWhich     * @return  

Problem StatementSolution by Per  @ topcoder #include sstream> #include algorithm> #include cmath> #include iostream> #include map> #include set> #include string> #include vector> using namespac