n: 40 m: 260 packed: 13 density: 0 nodes: 0 solveTime: 1530 buildTime: 40 solved: true
{0,15,20}
{1,25,29}
{2,17,24}
{3,31,38}
{4,16,19}
{5,26,34}
{6,13,27}
{7,23,28}
{8,32,36}
{9,18,35}
{10,12,30}
{11,14,22}
{21,37,39}