n: 40 m: 745 packed: 13 density: 0 nodes: 0 solveTime: 392450 buildTime: 330 solved: true
{0,12,15}
{1,9,24}
{2,7,31}
{3,6,18}
{4,5,10}
{8,16,28}
{11,13,23}
{14,29,38}
{19,20,35}
{21,25,26}
{22,34,39}
{27,30,37}
{32,33,36}