n: 40 m: 420 packed: 13 density: 0 nodes: 0 solveTime: 14970 buildTime: 110 solved: true
{0,15,24}
{1,21,30}
{2,28,37}
{3,7,38}
{4,26,33}
{5,10,23}
{6,9,13}
{11,20,34}
{12,22,35}
{14,16,19}
{17,18,27}
{25,31,39}
{29,32,36}