n: 40 m: 639 packed: 13 density: 0 nodes: 0 solveTime: 81530 buildTime: 240 solved: true
{0,20,25}
{1,14,21}
{2,17,34}
{3,32,37}
{4,8,10}
{5,15,26}
{6,7,27}
{9,13,16}
{11,12,22}
{18,29,30}
{19,31,35}
{23,33,36}
{24,38,39}