n: 40 m: 671 packed: 13 density: 0 nodes: 0 solveTime: 39210 buildTime: 260 solved: true
{0,8,19}
{1,22,35}
{2,5,12}
{3,6,9}
{4,14,18}
{10,13,16}
{11,26,33}
{15,17,39}
{20,21,25}
{23,30,37}
{24,28,31}
{27,29,34}
{32,36,38}