diff options
Diffstat (limited to 'datastructures')
| -rw-r--r-- | datastructures/fenwickTree.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/datastructures/fenwickTree.cpp b/datastructures/fenwickTree.cpp index bb3f72d..3b54fc9 100644 --- a/datastructures/fenwickTree.cpp +++ b/datastructures/fenwickTree.cpp @@ -1,8 +1,9 @@ vector<int> FT; //Fenwick-Tree +int n; //Build an Fenwick-Tree over an array a. Time Complexity: O(n*log(n)) void buildFenwickTree(vector<int>& a) { - int n = a.size(); + n = a.size(); FT.assign(n+1,0); for(int i = 0; i < n; i++) updateFT(i,a[i]); } |