diff --git a/TangDou/Topic/HuanGenDp/P6419.cpp b/TangDou/Topic/HuanGenDp/P6419.cpp
index 0f1a1d2..f358e85 100644
--- a/TangDou/Topic/HuanGenDp/P6419.cpp
+++ b/TangDou/Topic/HuanGenDp/P6419.cpp
@@ -26,17 +26,15 @@ void dfs1(int u, int fa) {
         int v = e[i];
         if (v == fa) continue;
         dfs1(v, u);
-        if (sz[v]) {
-            g[u] += g[v] + 2 * w[i];
-            int now = mx1[v] + w[i];
-            if (now >= mx1[u]) {
-                mx2[u] = mx1[u];
-                mx1[u] = now;
-                id[u] = v;
-            } else if (now >= mx2[u]) {
-                mx2[u] = now;
-            }
-        }
+        if (sz[v] == 0) continue;
+        g[u] += g[v] + 2 * w[i];
+        int now = mx1[v] + w[i];
+        if (now >= mx1[u]) {
+            mx2[u] = mx1[u];
+            mx1[u] = now;
+            id[u] = v;
+        } else if (now >= mx2[u])
+            mx2[u] = now;
         sz[u] += sz[v];
     }
 }
@@ -53,9 +51,9 @@ void dfs2(int u, int fa) {
             up[v] = max(up[u], mx1[u]) + w[i];
         } else if (sz[v] && sz[v] != k) {
             ans[v] = ans[u];
-            if (id[u] == v) {
+            if (id[u] == v)
                 up[v] = max(mx2[u], up[u]) + w[i];
-            } else
+            else
                 up[v] = max(up[u], mx1[u]) + w[i];
         }