n: 40 m: 375 packed: 13 density: 0 nodes: 0 solveTime: 8560 buildTime: 90 solved: true
{0,17,20}
{1,4,21}
{2,5,16}
{3,30,32}
{6,12,18}
{7,13,14}
{9,33,37}
{10,19,26}
{11,24,29}
{15,27,39}
{22,23,36}
{25,34,35}
{28,31,38}