n: 40 m: 660 packed: 13 density: 0 nodes: 0 solveTime: 24530 buildTime: 270 solved: true
{0,29,32}
{1,7,18}
{2,4,11}
{3,8,20}
{5,33,35}
{9,10,28}
{12,27,37}
{13,17,38}
{14,24,26}
{15,23,30}
{16,34,36}
{19,31,39}
{21,22,25}