n: 40 m: 683 packed: 13 density: 0 nodes: 0 solveTime: 94770 buildTime: 270 solved: true
{0,28,31}
{1,19,24}
{2,17,38}
{3,29,34}
{4,18,37}
{5,9,26}
{6,7,8}
{10,11,13}
{12,21,36}
{15,16,22}
{20,27,35}
{23,30,33}
{25,32,39}