diff --git a/Graph/lca.cpp b/Graph/lca.cpp
index b6d695f..f45ee1c 100644
--- a/Graph/lca.cpp
+++ b/Graph/lca.cpp
@@ -1,18 +1,14 @@
-namespace lca {
-	int d[MX], L[MX][20];
-	void dfs(vector<int> * G, int u = 1, int p = 0) {
-		d[u] = d[p] + 1, L[u][0] = p;
-		for (int i = 0; i < 18 && L[u][i]; i++) L[u][i + 1] = L[L[u][i]][i];
-		for (auto & v : G[u]) if (v != p) dfs(G, v, u);
-	}
-	int lca(vector<int> * G, int u, int v) {
-		if (d[u] > d[v]) swap(u, v);
-		for (int i = 18; i >= 0; --i) if (d[v] - (1 << i) >= d[u]) v = L[v][i];
-		if (u == v) return u;
-		for (int i = 18; i >= 0; --i) if (L[u][i] && L[u][i] != L[v][i]) u = L[u][i], v = L[v][i];
-		return L[u][0];
-	}
-	inline int dist(vector<int> * G, int u, int v) {
-		return d[u]+d[v]-2*d[lca(G, u, v)];
-	}
+int d[MX], L[MX][20];
+void dfs(int u = 1, int p = 0) {
+	d[u] = d[p] + 1, L[u][0] = p;
+	for (int i = 0; i < 18 && L[u][i]; i++) L[u][i+1] = L[L[u][i]][i];
+	for (auto & v : G[u]) if (v != p) dfs(v, u);
 }
+int lca(int u, int v) {
+	if (d[u] > d[v]) swap(u, v);
+	for (int i = 18; i >= 0; --i) if (d[v] - (1<<i) >= d[u]) v = L[v][i];
+	if (u == v) return u;
+	for (int i = 18; i >= 0; --i) if (L[u][i] && L[u][i] != L[v][i]) u = L[u][i], v = L[v][i];
+	return L[u][0];
+}
+inline int dist(int u, int v) { return d[u]+d[v]-2*d[lca(u, v)]; }