n: 40 m: 402 packed: 13 density: 0 nodes: 0 solveTime: 8510 buildTime: 90 solved: true
{0,20,21}
{1,24,37}
{2,6,19}
{3,7,31}
{4,5,18}
{8,9,28}
{10,23,33}
{11,22,30}
{12,26,38}
{13,14,15}
{16,29,39}
{17,25,27}
{32,35,36}