n: 40 m: 305 packed: 13 density: 0 nodes: 0 solveTime: 2840 buildTime: 60 solved: true
{0,15,23}
{1,14,21}
{2,16,26}
{3,5,18}
{4,7,13}
{6,28,36}
{8,12,31}
{9,33,38}
{10,20,39}
{11,27,30}
{17,19,24}
{22,32,37}
{25,29,35}