n: 40 m: 253 packed: 13 density: 0 nodes: 0 solveTime: 1410 buildTime: 40 solved: true
{0,16,31}
{1,19,20}
{2,33,35}
{3,28,34}
{4,26,38}
{5,17,23}
{6,8,25}
{7,13,24}
{9,22,27}
{10,14,37}
{11,12,32}
{15,21,29}
{18,36,39}