n: 40 m: 670 packed: 13 density: 0 nodes: 0 solveTime: 37150 buildTime: 260 solved: true
{0,18,26}
{1,3,13}
{2,36,38}
{4,5,12}
{6,23,34}
{7,8,19}
{9,28,33}
{11,30,32}
{14,24,25}
{15,31,39}
{16,35,37}
{17,21,27}
{20,22,29}