the solution given in this topcodertutorialuses tree[max_x][max_y] which is tree[10^9][10^9] and surely one will get 'out of memory' error. I have tried to compress the value of x,y (mapping {1,2,3..} to input set) but still it takes 10^5*10^5 which is out of bound....
ans.push_back(tree.query(ranks[nums[i]] - 1)); tree.update(ranks[nums[i]], 1); } std::reverse(ans.begin(), ans.end()); return ans; } }; Prefix sums of frequencise, convert the number to its rank as in sorted array. For example: Input: [5, 2, 6, 1] sorted: [1, 2...
\inputminted[fontsize=\footnotesize]{java}{FenwickTree.java} \caption{Implementing Fenwick trees with bit tricks} \label{fig:fenwick-java} \end{figure}Our goal is \emph{not} to write elegant functional code for this---already solved!---problem. Rather, our goal will be to use a ...
Algorithms, 4th edition textbook code and libraries - algs/src/main/java/edu/princeton/cs/algs4/FenwickTree.java at master · zaumniks/algs
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