n: 40 m: 531 packed: 13 density: 0 nodes: 0 solveTime: 33730 buildTime: 160 solved: true
{0,21,28}
{1,13,30}
{2,3,26}
{4,32,34}
{5,7,38}
{6,14,19}
{8,9,22}
{10,16,24}
{11,23,25}
{12,33,35}
{17,18,31}
{20,27,36}
{29,37,39}