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QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#541559 | #4815. Flower's Land | gubshig | WA | 1ms | 6124kb | C++17 | 2.5kb | 2024-08-31 20:00:08 | 2024-08-31 20:00:10 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
constexpr int MAX_N = 40001, MAX_K = 3001;
using ll = long long;
int N, K;
vector<ll> Dp[MAX_N];
ll A[MAX_N], Ans[MAX_N];
vector<int> Adj[MAX_N];
void Comb(vector<ll> &dp1, vector<ll> &dp2) {
dp1.resize(min(K, (int) dp1.size() + (int) dp2.size() - 1) + 1);
for (int i = (int) dp1.size() - 1; i >= 0; i--) {
for (int j = min(i, (int) dp2.size() - 1); j >= 0; j--) {
dp1[i] = max(dp1[i], dp1[i - j] + dp2[j]);
}
}
}
void Extend(vector<ll> &dp, int v) {
if (dp.size() <= K) dp.push_back(0);
for (int i = (int) dp.size() - 2; i >= 0; i--) {
dp[i + 1] = dp[i] + A[v];
}
}
void Dfs1(int v, int p=0) {
Dp[v].push_back(0);
for (auto &nxt: Adj[v]) {
if (nxt != p) Dfs1(nxt, v);
}
for (auto &nxt: Adj[v]) {
if (nxt == p) continue;
auto nxt_dp = Dp[nxt];
Extend(nxt_dp, nxt);
Comb(Dp[v], nxt_dp);
}
}
void Dfs2(int v, vector<ll> par_dp={0}, int p=0) {
vector<vector<ll>> cdp(Adj[v].size() - (p != 0) + 1);
cdp[0] = par_dp;
int it = 1;
for (auto &nxt: Adj[v]) {
if (nxt == p) continue;
cdp[it] = cdp[it - 1];
auto nxt_dp = Dp[nxt];
Extend(nxt_dp, nxt);
Comb(cdp[it], nxt_dp);
it++;
}
reverse(Adj[v].begin(), Adj[v].end());
it = (int) cdp.size() - 1;
vector<ll> cumult_dp = {0};
for (auto &nxt: Adj[v]) {
if (nxt == p) continue;
it--;
auto prev_cdp = cdp[it];
Extend(prev_cdp, v);
Dfs2(nxt, prev_cdp, v);
for (int i = 0; i < min((int) prev_cdp.size(), K); i++) {
if (K - i - 1 < Dp[nxt].size()) {
Ans[nxt] = max(Ans[nxt], prev_cdp[i] + Dp[nxt][K - i - 1]);
}
}
Ans[nxt] += A[nxt];
Extend(Dp[nxt], nxt);
for (int i = 0; i + 1 < it; i++) {
Comb(Dp[it], Dp[nxt]);
}
}
}
int main() {
cin.tie(nullptr)->sync_with_stdio(0);
cin >> N >> K;
for (int i = 1; i <= N; i++) cin >> A[i];
for (int it = 0; it < N - 1; it++) {
int u, v; cin >> u >> v;
Adj[u].push_back(v);
Adj[v].push_back(u);
}
int root = 1;
Dfs1(root);
Ans[root] = Dp[root][K - 1] + A[root];
Dfs2(root);
for (int i = 1; i <= N; i++) {
cout << Ans[i] << " ";
}
}
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 5416kb
input:
5 3 6 10 4 3 4 3 4 4 2 2 5 5 1
output:
20 20 17 17 20
result:
ok 5 number(s): "20 20 17 17 20"
Test #2:
score: 0
Accepted
time: 0ms
memory: 5504kb
input:
7 4 1 3 2 1 7 12 17 4 6 1 4 5 1 2 5 7 6 3 2
output:
31 13 13 31 21 31 31
result:
ok 7 numbers
Test #3:
score: 0
Accepted
time: 0ms
memory: 6124kb
input:
1 1 20
output:
20
result:
ok 1 number(s): "20"
Test #4:
score: 0
Accepted
time: 1ms
memory: 5436kb
input:
10 3 19 7 25 18 93 97 21 51 60 80 6 7 7 1 1 9 9 10 10 2 2 5 5 3 3 8 8 4
output:
159 180 169 94 180 137 137 169 159 180
result:
ok 10 numbers
Test #5:
score: -100
Wrong Answer
time: 1ms
memory: 6040kb
input:
20 3 932 609 248 720 831 253 418 482 1000 542 436 304 217 163 872 380 704 845 497 610 17 12 1 17 15 17 13 17 2 15 16 2 18 16 8 16 4 16 19 4 6 4 20 19 10 19 9 10 5 10 7 9 3 9 14 5 11 7
output:
2508 2201 1790 1945 2373 1470 1960 1707 2039 2373 1854 1940 1853 1536 2508 1945 2508 1834 2039 1827
result:
wrong answer 2nd numbers differ - expected: '2185', found: '2201'