const n=10.
const m=10.
const r=21.


room(0,1,1,3,3). has(0,2).
room(1,4,1,6,3). has(1,4).
room(2,7,1,8,1). has(2,-1).
room(3,9,1,9,1). has(3,-1).
room(4,10,1,10,1). has(4,-1).
room(5,10,2,10,4). has(5,-1).
room(6,1,4,5,4). has(6,-1).
room(7,6,4,9,4). has(7,2).
room(8,1,5,2,8). has(8,3).
room(9,3,5,6,6). has(9,4).
room(10,7,5,10,6). has(10,-1).
room(11,1,9,2,10). has(11,-1).
room(12,3,7,3,9). has(12,-1).
room(13,3,10,3,10). has(13,-1).
room(14,4,7,5,10). has(14,-1).
room(15,6,7,7,9). has(15,3).
room(16,6,10,7,10). has(16,-1).
room(17,8,7,9,8). has(17,-1).
room(18,8,9,9,10). has(18,-1).
room(19,10,7,10,10). has(19,2).
room(20,7,2,9,3). has(20,2).



