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-rw-r--r--content/graph/reroot.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/content/graph/reroot.cpp b/content/graph/reroot.cpp
index 3ed19d0..379c839 100644
--- a/content/graph/reroot.cpp
+++ b/content/graph/reroot.cpp
@@ -4,7 +4,7 @@ vector<vector<pair<int, W>>> adj;
struct Reroot {
using T = ll; // dp type
- T E = 0; // neutral element
+ static constexpr T E = 0; // neutral element
T takeChild(int v, int c, W w, T x) {} // move child along edge
static T comb(T x, T y) {}
T fin(int v, T x) {} // add v to own dp value x