n: 40 m: 638 packed: 13 density: 0 nodes: 0 solveTime: 41270 buildTime: 250 solved: true
{0,1,12}
{2,20,31}
{3,35,38}
{4,8,19}
{5,22,25}
{6,26,33}
{7,11,17}
{9,30,39}
{13,14,27}
{15,18,24}
{16,21,36}
{23,28,37}
{29,32,34}