n: 40 m: 316 packed: 13 density: 0 nodes: 0 solveTime: 3540 buildTime: 60 solved: true
{0,19,20}
{1,4,17}
{2,16,25}
{3,13,37}
{6,23,31}
{7,29,32}
{8,24,38}
{9,28,30}
{10,27,33}
{11,12,18}
{14,35,36}
{15,21,22}
{26,34,39}