n: 40 m: 320 packed: 13 density: 0 nodes: 0 solveTime: 2820 buildTime: 80 solved: true
{0,9,37}
{1,2,5}
{3,6,21}
{4,17,26}
{7,29,38}
{8,28,34}
{10,14,33}
{11,12,24}
{13,15,25}
{16,18,22}
{19,31,32}
{20,23,39}
{27,30,35}