n: 40 m: 572 packed: 13 density: 0 nodes: 0 solveTime: 17800 buildTime: 190 solved: true
{0,16,21}
{1,9,23}
{2,5,10}
{3,11,26}
{4,12,37}
{7,29,36}
{8,19,27}
{13,30,34}
{14,20,24}
{15,35,39}
{17,22,32}
{18,28,31}
{25,33,38}