answer.code:1:1: error: ‘vector’ does not name a type
1 | vector<int>g[MAXN];
| ^~~~~~
answer.code:3:7: error: ‘MAXN’ was not declared in this scope
3 | int a[MAXN];
| ^~~~
answer.code:4:7: error: ‘MAXN’ was not declared in this scope
4 | int f[MAXN], sum[MAXN], t[MAXN];
| ^~~~
answer.code:4:18: error: ‘MAXN’ was not declared in this scope
4 | int f[MAXN], sum[MAXN], t[MAXN];
| ^~~~
answer.code:4:27: error: ‘MAXN’ was not declared in this scope
4 | int f[MAXN], sum[MAXN], t[MAXN];
| ^~~~
answer.code: In function ‘void dfs(int, int)’:
answer.code:7:9: error: ‘multiset’ was not declared in this scope
7 | multiset<int>st;//维护t[v] = 3的点的最大值
| ^~~~~~~~
answer.code:7:18: error: expected primary-expression before ‘int’
7 | multiset<int>st;//维护t[v] = 3的点的最大值
| ^~~
answer.code:8:22: error: ‘g’ was not declared in this scope
8 | for (int v : g[u]) {
| ^
answer.code:11:17: error: ‘sum’ was not declared in this scope
11 | sum[u] += f[v];
| ^~~
answer.code:11:27: error: ‘f’ was not declared in this scope
11 | sum[u] += f[v];
| ^
answer.code:12:30: error: ‘a’ was not declared in this scope
12 | mx = max(mx, a[v]);//找到a[v]的最大值
| ^
answer.code:12:22: error: ‘max’ was not declared in this scope; did you mean ‘mx’?
12 | mx = max(mx, a[v]);//找到a[v]的最大值
| ^~~
| mx
answer.code:13:21: error: ‘t’ was not declared in this scope
13 | if (t[v] == 3)st.insert(a[v]);//把t[v] = 3 的点放进来
| ^
answer.code:13:31: error: ‘st’ was not declared in this scope; did you mean ‘std’?
13 | if (t[v] == 3)st.insert(a[v]);//把t[v] = 3 的点放进来
| ^~
| std
answer.code:15:9: error: ‘f’ was not declared in this scope
15 | f[u] = sum[u] + mx;
| ^
answer.code:15:16: error: ‘sum’ was not declared in this scope
15 | f[u] = sum[u] + mx;
| ^~~
answer.code:16:9: error: ‘st’ was not declared in this scope; did you mean ‘std’?
16 | st.insert(-INF);
| ^~
| std
answer.code:16:20: error: ‘INF’ was not declared in this scope
16 | st.insert(-INF);
| ^~~
answer.code:17:22: error: ‘g’ was not declared in this scope
17 | for (int v : g[u]) {
| ^
answer.code:19:21: error: ‘t’ was not declared in this scope
19 | if (t[v] == 3)st.erase(st.find(a[v]));
| ^
answer.code:19:48: error: ‘a’ was not declared in this scope
19 | if (t[v] == 3)st.erase(st.find(a[v]));
| ^
answer.code:20:49: error: ‘a’ was not declared in this scope
20 | f[u] = max(f[u],sum[u] - f[v] + a[v] + sum[v] + *st.rbegin());
| ^
answer.code:20:24: error: ‘max’ was not declared in this scope; did you mean ‘mx’?
20 | f[u] = max(f[u],sum[u] - f[v] + a[v] + sum[v] + *st.rbegin());
| ^~~
| mx
answer.code:21:21: error: ‘t’ was not declared in this scope
21 | if (t[v] == 3)st.insert(a[v]);//注意不要忘了添加回去
| ^
answer.code: In function ‘void slove()’:
answer.code:25:9: error: ‘cin’ was not declared in this scope
25 | cin >> n;
| ^~~
answer.code:26:37: error: ‘g’ was not declared in this scope
26 | for (int i = 1; i <= n; i++)g[i].clear(), f[i] = sum[i] = 0;
| ^
answer.code:26:51: error: ‘f’ was not declared in this scope
26 | for (int i = 1; i <= n; i++)g[i].clear(), f[i] = sum[i] = 0;
| ^
answer.code:26:58: error: ‘sum’ was not declared in this scope
26 | for (int i = 1; i <= n; i++)g[i].clear(), f[i] = sum[i] = 0;
| ^~~
answer.code:27:44: error: ‘a’ was not declared in this scope
27 | for (int i = 1; i <= n; i++)cin >> a[i];
| ^
answer.code:28:44: error: ‘t’ was not declared in this scope
28 | for (int i = 1; i <= n; i++)cin >> t[i];
| ^
answer.code:31:17: error: ‘g’ was not declared in this scope
31 | g[u].push_back(v);
| ^
answer.code:35:9: error: ‘cout’ was not declared in this scope
35 | cout << f[1] + a[1] << endl;
...