n: 40 m: 297 packed: 13 density: 0 nodes: 0 solveTime: 5900 buildTime: 50 solved: true
{0,20,24}
{1,5,17}
{2,31,34}
{3,11,13}
{4,6,39}
{7,18,19}
{8,21,26}
{9,14,25}
{10,29,36}
{12,27,38}
{15,33,35}
{22,23,30}
{28,32,37}