n: 40 m: 452 packed: 13 density: 0 nodes: 0 solveTime: 21360 buildTime: 120 solved: true
{0,19,30}
{1,15,24}
{2,33,39}
{3,5,18}
{4,10,31}
{6,28,36}
{7,11,13}
{8,14,16}
{9,12,20}
{17,34,35}
{21,23,29}
{25,26,38}
{27,32,37}