return S;
}
==

 
h2. Teme pentru acasa
 
* 'SGU 174 - Walls':http://acm.sgu.ru/problem.php?contest=0&problem=174
* 'UVA 10748 - Knights Roaming':http://icpcres.ecs.baylor.edu/onlinejudge/external/107/10748.html
* 'UVA 10815 - Andy's First Dictionary':http://icpcres.ecs.baylor.edu/onlinejudge/external/108/10815.html
* 'UVA 10887 - Concatenation of Languages':http://icpcres.ecs.baylor.edu/onlinejudge/external/108/10887.html
* 'UVA 704 - Colour Hash':http://icpcres.ecs.baylor.edu/onlinejudge/external/7/704.html
 
*Feedback (Stefan):* E nevoie de mai multe exemple sau mai multe detalii pentru anumite probleme?