Find the Walls

Problem Number: 
3 209
Type of Problem: 
Problem Category: 
Input: 
Random Input
0
0
Critical Input: 
Random Input: 
8 2 5 2 0 3 4 3 7 0 5 2 3 0 3 3 6 1 3 0 1 0 5 3 6 3 5 3 0 1 4 1 4 1 1 5 4 5 7 4 4 4 2 3 0 1 4 2 1 5 3 4 4 1 2 3 2 2 2 2 3 1 2 2 2
Problem Id: 
3209