n: 40 m: 312 packed: 13 density: 0 nodes: 0 solveTime: 2860 buildTime: 60 solved: true
{0,20,28}
{1,23,29}
{2,25,39}
{3,18,24}
{4,13,19}
{5,27,31}
{6,26,38}
{7,10,36}
{8,11,35}
{9,16,33}
{12,15,30}
{17,22,37}
{21,32,34}