n: 40 m: 213 packed: 13 density: 0 nodes: 0 solveTime: 1770 buildTime: 30 solved: true
{0,13,20}
{1,10,25}
{2,27,34}
{3,31,38}
{4,11,30}
{5,36,39}
{6,9,22}
{7,23,33}
{8,21,24}
{12,16,35}
{14,28,29}
{15,26,32}
{17,18,37}