[subject line]
add combination sum without duplicates,
0-1 knapsack
[Bug input/output]
input   output  expected
[4,4,2,1,4,2,2,1,3], 6
[[2,4],[1,1,4],[1,2,3],[2,2,2],[1,1,2,2],[1,1,2,2],[1,1,2,2]]
[[1,1,2,2],[1,1,4],[1,2,3],[2,2,2],[2,4]]

[Fix]
See next commit
[subject line]
Add Combination Sum