n: 40 m: 634 packed: 13 density: 0 nodes: 0 solveTime: 34510 buildTime: 230 solved: true
{0,15,17}
{1,8,14}
{2,3,19}
{4,31,33}
{5,27,28}
{6,23,36}
{7,24,35}
{9,38,39}
{10,11,18}
{12,16,20}
{13,21,37}
{22,26,29}
{30,32,34}