n: 40 m: 533 packed: 13 density: 0 nodes: 0 solveTime: 22590 buildTime: 170 solved: true
{0,18,31}
{1,9,23}
{2,7,33}
{3,6,14}
{4,5,11}
{10,13,35}
{12,17,39}
{15,16,25}
{19,26,27}
{20,29,30}
{21,28,34}
{22,32,37}
{24,36,38}