n: 40 m: 638 packed: 13 density: 0 nodes: 0 solveTime: 48620 buildTime: 240 solved: true
{0,15,18}
{1,4,9}
{2,10,24}
{3,30,37}
{6,22,35}
{7,13,32}
{8,12,21}
{11,26,36}
{14,31,33}
{16,34,39}
{17,20,29}
{19,23,25}
{27,28,38}