n: 40 m: 152 packed: 13 density: 0 nodes: 0 solveTime: 310 buildTime: 10 solved: true {0,5,16} {1,25,35} {2,20,32} {3,29,30} {4,19,33} {6,22,39} {7,17,24} {8,12,38} {9,23,36} {11,21,28} {13,26,37} {14,27,34} {15,18,31}