n: 40 m: 615 packed: 13 density: 0 nodes: 0 solveTime: 16200 buildTime: 220 solved: true
{0,1,9}
{2,3,12}
{4,5,29}
{6,30,33}
{7,13,16}
{8,11,26}
{10,34,35}
{14,20,21}
{15,19,37}
{17,31,36}
{18,25,27}
{23,24,32}
{28,38,39}