n: 40 m: 469 packed: 13 density: 0 nodes: 0 solveTime: 27870 buildTime: 130 solved: true
{0,5,16}
{1,12,14}
{2,3,17}
{4,9,10}
{6,33,37}
{7,22,23}
{8,11,19}
{13,21,34}
{15,29,38}
{18,24,35}
{20,30,39}
{25,26,31}
{27,32,36}