n: 40 m: 397 packed: 13 density: 0 nodes: 0 solveTime: 8320 buildTime: 90 solved: true
{0,9,15}
{1,10,13}
{2,7,23}
{3,6,11}
{4,8,18}
{12,19,26}
{14,28,33}
{16,29,30}
{17,34,35}
{20,22,24}
{21,38,39}
{25,27,32}
{31,36,37}