n: 40 m: 241 packed: 13 density: 0 nodes: 0 solveTime: 2160 buildTime: 30 solved: true
{0,15,38}
{1,20,32}
{2,13,28}
{3,34,36}
{4,16,35}
{5,11,21}
{6,7,10}
{8,18,26}
{9,14,37}
{12,19,29}
{17,33,39}
{22,25,27}
{23,24,30}