n: 40 m: 551 packed: 13 density: 0 nodes: 0 solveTime: 20780 buildTime: 170 solved: true
{0,12,20}
{1,23,38}
{2,25,30}
{3,6,21}
{4,8,14}
{7,15,29}
{9,19,36}
{10,17,24}
{11,26,37}
{13,22,32}
{16,31,39}
{18,27,28}
{33,34,35}