n: 40 m: 306 packed: 13 density: 0 nodes: 0 solveTime: 2810 buildTime: 60 solved: true
{0,26,31}
{1,27,28}
{2,10,30}
{3,9,36}
{4,5,19}
{6,12,15}
{8,33,38}
{11,24,32}
{13,34,39}
{14,29,35}
{16,18,22}
{17,20,25}
{21,23,37}