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creating quadratic features for pairs: MF 
Num weight bits = 18
learning rate = 0.5
initial_t = 0
power_t = 0.5
decay_learning_rate = 1
final_regressor = topk.model
creating cache_file = topk-train.cache
Reading datafile = train-sets/topk.vw
num sources = 1
average    since         example     example  current  current  current
loss       last          counter      weight    label  predict features
9.000000   9.000000            1         1.0   3.0000   0.0000        4
4.590362   0.180723            2         2.0   0.0000   0.4251        4
2.946029   1.301697            4         4.0  unknown   0.2876        1
2.641212   2.336395            8         8.0  unknown   0.4281        1
1.946607   1.252001           16        16.0  unknown   0.6361        1
1.419245   0.891883           32        32.0  unknown   0.7515        1
0.908998   0.398751           64        64.0  unknown   0.8212        1
0.555815   0.202631          128       128.0  unknown   0.8758        1
0.302649   0.049484          256       256.0  unknown   0.9141        1
0.153927   0.005205          512       512.0  unknown   0.9356        1
0.077005   0.000083         1024      1024.0  unknown   0.9394        1

finished run
number of examples per pass = 12
passes used = 100
weighted example sum = 1200
weighted label sum = 1500
average loss = 0.0657109
best constant = 1.66667
total feature number = 3900