n: 40 m: 537 packed: 13 density: 0 nodes: 0 solveTime: 25090 buildTime: 170 solved: true
{0,3,8}
{1,38,39}
{2,21,23}
{4,32,37}
{5,6,22}
{7,10,16}
{9,12,27}
{11,24,29}
{13,30,33}
{14,20,35}
{15,34,36}
{17,25,28}
{18,19,31}