n: 40 m: 644 packed: 13 density: 0 nodes: 0 solveTime: 18950 buildTime: 220 solved: true
{0,19,21}
{1,3,8}
{2,36,38}
{4,6,9}
{5,7,18}
{10,12,13}
{14,34,39}
{15,16,22}
{17,23,30}
{20,27,32}
{24,33,37}
{25,28,29}
{26,31,35}