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Question from google online coding test goc33
there are 3 types of queries
0 X add a number X _ 1 X remove the number X (X always exist)_ _ 2 X return the number of subsets that sum to X_
0<=X<=10^3 0<=number of queries <=10^3
I tried to implement this using the knapsack approach but its bound to give TLE
any suggestions? Any help would be appreciated
