n: 40 m: 581 packed: 13 density: 0 nodes: 0 solveTime: 38100 buildTime: 180 solved: true
{0,20,38}
{1,2,12}
{3,34,39}
{4,33,36}
{5,6,8}
{7,16,25}
{9,13,15}
{10,17,29}
{11,26,27}
{14,19,31}
{21,22,23}
{24,28,30}
{32,35,37}