update fenwick tree

1 files changed, 1 insertions, 1 deletions

diff --git a/Data Structures/fenwick_tree.cpp b/Data Structures/fenwick_tree.cpp
index 4bd7354..aa87001 100644
--- a/Data Structures/fenwick_tree.cpp
+++ b/Data Structures/fenwick_tree.cpp
@@ -4,5 +4,5 @@ public:
 	fenwick_tree(int N) { FT.assign(N + 1, 0); }
 	void update(int x, T val) { if (x > 0) for (; x < FT.size(); x += x & -x) FT[x] += val; }
 	T query(int x) { T ret = 0; if (x > 0) for (; x > 0; x -= x & -x) ret += FT[x]; return ret; }
-	T query(int x, int y) { return query(y) - (x == 1 ? 0 : query(x - 1)); }
+	T query(int x, int y) { return query(y) - query(x - 1); }
 };
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