Hidden Squares

Problem Number: 
10 504
Type of Problem: 
Single Output Problem
Problem Category: 
Volume 105 (10,500-10,599)
Input: 
Random Input
0
0
Critical Input: 
Random Input: 
3 2 AAA AAA BAB B A 4 2 ABBA BBBB ABBB ABBA A B 0
Problem Description Link: 
https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=1…
Problem Id: 
10504