n: 40 m: 452 packed: 13 density: 0 nodes: 0 solveTime: 4000 buildTime: 120 solved: true
{0,28,30}
{1,2,14}
{3,6,18}
{4,22,33}
{5,26,38}
{7,31,37}
{8,11,19}
{9,27,34}
{10,15,23}
{12,20,39}
{13,24,32}
{16,21,29}
{17,25,35}