n: 40 m: 268 packed: 13 density: 0 nodes: 0 solveTime: 2800 buildTime: 50 solved: true
{0,5,16}
{1,13,26}
{2,28,30}
{3,23,31}
{4,29,38}
{6,8,14}
{7,21,25}
{9,18,22}
{10,15,36}
{11,20,24}
{12,27,39}
{17,19,32}
{33,35,37}