n: 40 m: 697 packed: 13 density: 0 nodes: 0 solveTime: 25020 buildTime: 280 solved: true
{0,19,38}
{1,18,28}
{2,3,4}
{6,15,26}
{7,12,13}
{8,11,34}
{9,20,25}
{10,17,24}
{14,21,29}
{16,22,33}
{23,35,36}
{27,30,31}
{32,37,39}