n: 40 m: 534 packed: 13 density: 0 nodes: 0 solveTime: 15040 buildTime: 170 solved: true
{0,16,20}
{1,23,30}
{2,9,19}
{3,7,28}
{4,5,12}
{6,13,18}
{8,21,38}
{10,14,29}
{11,25,31}
{15,17,36}
{22,32,33}
{26,27,39}
{34,35,37}