n: 40 m: 257 packed: 13 density: 0 nodes: 0 solveTime: 3260 buildTime: 50 solved: true
{0,20,28}
{1,10,12}
{2,24,25}
{3,11,29}
{4,22,26}
{5,8,23}
{6,19,32}
{7,13,34}
{9,14,37}
{15,17,21}
{16,36,39}
{18,30,31}
{27,33,38}