n: 40 m: 489 packed: 13 density: 0 nodes: 0 solveTime: 15840 buildTime: 140 solved: true
{0,19,23}
{1,7,32}
{2,4,5}
{3,6,30}
{8,34,37}
{9,16,29}
{10,24,27}
{11,17,26}
{12,13,35}
{14,15,22}
{18,33,38}
{20,21,36}
{25,28,31}