n: 40 m: 275 packed: 13 density: 0 nodes: 0 solveTime: 2160 buildTime: 50 solved: true
{0,4,18}
{1,2,5}
{3,17,21}
{6,13,14}
{7,8,16}
{9,11,20}
{10,12,19}
{22,25,28}
{23,24,33}
{26,30,35}
{27,38,39}
{29,31,36}
{32,34,37}