n: 40 m: 509 packed: 13 density: 0 nodes: 0 solveTime: 25520 buildTime: 150 solved: true
{0,21,38}
{1,2,5}
{3,8,32}
{4,7,14}
{6,13,37}
{10,26,35}
{11,23,31}
{12,25,36}
{15,18,30}
{16,27,33}
{17,28,39}
{19,20,22}
{24,29,34}