n: 40 m: 678 packed: 13 density: 0 nodes: 0 solveTime: 23920 buildTime: 270 solved: true
{0,19,24}
{1,2,5}
{3,8,14}
{4,6,7}
{9,28,33}
{10,18,39}
{11,16,23}
{12,13,21}
{15,17,22}
{20,25,30}
{27,36,37}
{29,34,38}
{31,32,35}