n: 40 m: 334 packed: 13 density: 0 nodes: 0 solveTime: 3600 buildTime: 60 solved: true
{0,20,23}
{1,17,18}
{2,7,39}
{3,16,22}
{4,8,36}
{5,12,31}
{6,37,38}
{9,24,33}
{10,28,29}
{11,30,34}
{13,25,26}
{14,32,35}
{15,19,21}