#include <bits/stdc++.h>
using namespace std;
typedef long long int64;
const int64 mod = 1e9 + 7;
const int maxn = 1e3 + 2;
int64 dp[maxn], down[maxn], c[maxn][maxn];
int p[maxn];
vector <int> ad [maxn];
int n;
void upd (int u) {
vector <int64> d;
for (int v: ad[u]) {
down[u] = max(down[u], down[v] + c[u][v]);
d.push_back(down[v] + c[u][v]);
}
sort(d.rbegin(), d.rend());
for (int i = 0; i < min((int) d.size(), 2); i++) dp[u]+=d[i];
}
void dfs (int u) {
for (int v: ad[u]) {
dfs(v);
}
upd(u);
}
int64 calc () {
for (int i = 0; i < n; i++) dp[i] = 0;
dfs(0);
int64 rs = 0;
for (int i = 0; i < n; i++){
rs+=dp[i];
}
return rs;
}
int main() {
cin >> n;
for (int i = 1; i <= n - 1; i++){
int x;
cin >> x;
ad[x].push_back(i);
p[i] = x;
}
for (int i = 1; i <= n - 1; i++){
int x;
cin >> x;
c[p[i]][i] = x;
}
cout << calc() << "\n";
int q;
cin >> q;
while (q--) {
int64 x,y;
cin >> x >> y;
c[p[x]][x] += y;
cout << calc() << "\n";
}
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
51 ms |
2900 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
1 ms |
468 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
2 ms |
468 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
51 ms |
2900 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |