лабиринт

1
1 1 1
1 1 1 1 1
1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1
1 1 1 1 3 1 1 5 1 1 1
1 1 1 7 1 1 1 1 1 1 9 1 1
1 1 11 1 1 1 1 1 1 1 1 1 1 13 1
1 15 1 1 1 1 1 1 1 1 1 1 1 1 1 1 17
19 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 20
1
18 1
1 1 1
1 14 1 1
1 1 1 1 1
1 1 10 1 1 1
1 1 1 1 1 1 1
1 1 1 6 1 1 1 1
1 1 1 1 1 1 1 1 1
1 1 1 1 2 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1
1 1 1 1 4 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 8 1 1 1
1 1 1 1 1 1
1 1 12 1 1
1 1 1 1
1 16 1
1 1
20