n: 40 m: 687 packed: 13 density: 0 nodes: 0 solveTime: 396260 buildTime: 280 solved: true
{0,5,20}
{1,13,24}
{2,3,4}
{6,9,10}
{7,28,37}
{8,34,35}
{11,12,21}
{14,26,29}
{15,16,25}
{17,27,31}
{19,22,36}
{23,30,38}
{32,33,39}