More changes in fenwick implementation.

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]);
 }