n: 40 m: 173 packed: 13 density: 0 nodes: 0 solveTime: 1330 buildTime: 20 solved: true
{0,4,28}
{1,14,26}
{2,27,32}
{3,18,23}
{5,20,22}
{6,9,39}
{7,10,25}
{8,12,21}
{11,31,33}
{13,16,34}
{15,24,30}
{17,36,37}
{19,29,38}