Create 1949.cpp

encrypted-def · web-flow · commit a190c8502c60 · 2025-04-19T19:42:13.000+09:00
diff --git a/Appendix E/1949.cpp b/Appendix E/1949.cpp
@@ -0,0 +1,40 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+int n;
+int a[10005];
+int d1[10005];
+int d2[10005];
+
+vector<int> adj[10005];
+
+// d1[cur]와 d2[cur]를 계산하는 함수
+void dfs(int cur, int par){
+  d1[cur] = a[cur];
+  d2[cur] = 0;
+  for(int nxt : adj[cur]){
+    if(par == nxt) continue;
+    dfs(nxt, cur);
+    d1[cur] += d2[nxt];
+    d2[cur] += max(d1[nxt], d2[nxt]);
+  }
+}
+
+int main(){
+  ios::sync_with_stdio(0);
+  cin.tie(0);
+
+  cin >> n;
+  for(int i = 1; i <= n; i++)
+    cin >> a[i];
+  
+  for(int i = 0; i < n-1; i++){
+    int u, v;
+    cin >> u >> v;
+    adj[u].push_back(v);
+    adj[v].push_back(u);
+  }
+
+  dfs(1, 0);
+  cout << max(d1[1], d2[1]);
+}
