n: 40 m: 487 packed: 13 density: 0 nodes: 0 solveTime: 14710 buildTime: 140 solved: true
{0,15,19}
{1,8,21}
{2,4,7}
{3,23,35}
{5,27,32}
{6,25,28}
{9,22,36}
{10,12,14}
{13,20,24}
{16,30,33}
{17,26,37}
{18,29,31}
{34,38,39}