n: 40 m: 281 packed: 13 density: 0 nodes: 0 solveTime: 2120 buildTime: 40 solved: true
{0,24,37}
{1,16,33}
{2,27,39}
{3,7,12}
{5,10,21}
{6,35,38}
{8,9,28}
{11,14,34}
{13,25,29}
{15,32,36}
{17,20,23}
{18,26,30}
{19,22,31}