n: 40 m: 531 packed: 13 density: 0 nodes: 0 solveTime: 51330 buildTime: 160 solved: true
{0,18,38}
{1,4,7}
{2,3,35}
{5,16,29}
{8,36,37}
{9,14,22}
{10,23,32}
{11,20,33}
{12,15,25}
{13,21,26}
{17,19,28}
{24,34,39}
{27,30,31}