n: 40 m: 220 packed: 13 density: 0 nodes: 0 solveTime: 19010 buildTime: 30 solved: true
{0,25,33}
{1,16,18}
{2,22,32}
{3,4,17}
{5,9,26}
{6,12,35}
{7,31,36}
{8,10,28}
{11,21,37}
{14,23,27}
{15,24,34}
{19,20,30}
{29,38,39}