n: 40 m: 558 packed: 13 density: 0 nodes: 0 solveTime: 19800 buildTime: 180 solved: true
{0,33,38}
{1,4,7}
{2,3,6}
{5,10,24}
{8,13,16}
{9,25,27}
{11,12,26}
{14,30,31}
{15,21,36}
{17,29,37}
{18,35,39}
{19,28,34}
{20,22,23}