Update segment_tree.cpp

1 files changed, 1 insertions, 1 deletions

diff --git a/Data Structures/segment_tree.cpp b/Data Structures/segment_tree.cpp
index 1d74f2c..c0f317b 100644
--- a/Data Structures/segment_tree.cpp
+++ b/Data Structures/segment_tree.cpp
@@ -11,7 +11,7 @@ template<typename T> struct seg_tree {
 		if (l == r) seg[n] = v;
 		else {
 			int m = (l+r)>>1;
-			build(l, m, n<<1), build(m+1, r, n<<1|1);
+			build(v, l, m, n<<1), build(v, m+1, r, n<<1|1);
 			seg[n] = pull(seg[n<<1], seg[n<<1|1]);
 		}
 	}