exp./n 3.01 1.09 time I BFS 0.15 MB2L 1.55 SQ2L 1.56 MB2D 3.86 SQ2D 2.26 MB-A SQ-A I Q2D 2.14 0.29 0.83 2.13 0.29 0.83 2.17 0.29 MB-A 1.86 4.88 0.61 1.81 4.17 0.63 1.73 8.89 SQ