n: 40 m: 545 packed: 13 density: 0 nodes: 0 solveTime: 23340 buildTime: 170 solved: true
{0,23,24}
{1,13,16}
{2,4,9}
{3,25,33}
{5,26,32}
{6,10,19}
{7,34,38}
{8,12,20}
{11,30,37}
{14,17,39}
{18,21,31}
{22,27,29}
{28,35,36}