n: 40 m: 307 packed: 13 density: 0 nodes: 0 solveTime: 4100 buildTime: 50 solved: true
{0,11,20}
{1,15,31}
{2,16,39}
{3,8,36}
{5,27,37}
{6,12,21}
{7,25,33}
{9,14,18}
{10,17,29}
{13,32,38}
{19,30,35}
{22,24,26}
{23,28,34}