#include <bits/stdc++.h>
using namespace std;
using lint = long long;
using pi = array<int, 2>;
#define sz(v) ((int)(v).size())
#define all(v) (v).begin(), (v).end()
const int MAX = 1050000;
int n, k, q, t, r1, r2;
int a[MAX], b[MAX], c[MAX], d[MAX];
vector<int> ids;
struct tree1 {
int dep[MAX], par[20][MAX];
vector<int> gph[MAX];
vector<pi> adj[MAX];
lint dist[MAX];
bool seen[MAX];
void add(int u, int v) {
gph[u].push_back(v);
gph[v].push_back(u);
}
void dfs(int x, int px) {
if (sz(ids) < k) {
ids.push_back(x);
}
dep[x] = dep[px] + 1;
par[0][x] = px;
for (int i = 1; i < 20; i++)
par[i][x] = par[i - 1][par[i - 1][x]];
for (auto& y : gph[x]) {
if (y == px) continue;
dfs(y, x);
}
}
int getlca(int s, int e) {
if (dep[s] < dep[e]) swap(s, e);
for (int i = 19; i >= 0; i--)
if (dep[par[i][s]] >= dep[e])
s = par[i][s];
if (s == e) return s;
for (int i = 19; i >= 0; i--)
if (par[i][s] != par[i][e])
s = par[i][s], e = par[i][e];
return par[0][s];
}
void dfs(int x) {
seen[x] = true;
for (auto& y : adj[x]) {
if (seen[y[0]]) continue;
dist[y[0]] = dist[x] + y[1];
dfs(y[0]);
}
}
void build() {
for (int i = 0; i + 1 < k; i++) {
int x = ids[i];
int y = ids[i + 1];
int z = getlca(ids[i], ids[i + 1]);
adj[x].push_back({z, -a[i]});
adj[z].push_back({x, a[i]});
adj[y].push_back({z, -b[i]});
adj[z].push_back({y, b[i]});
}
dfs(r1);
}
lint query(int x, int y) {
return dist[x] + dist[y] - 2 * dist[getlca(x, y)];
}
} tree1;
struct tree2 {
int dfn[MAX], T, dep[MAX], par[20][MAX];
vector<int> gph[MAX];
vector<pi> adj[MAX];
lint dist[MAX];
bool seen[MAX];
void add(int u, int v) {
gph[u].push_back(v);
gph[v].push_back(u);
}
void dfs(int x, int px) {
dfn[x] = ++T;
dep[x] = dep[px] + 1;
par[0][x] = px;
for (int i = 1; i < 20; i++)
par[i][x] = par[i - 1][par[i - 1][x]];
for (auto& y : gph[x]) {
if (y == px) continue;
dfs(y, x);
}
}
int getlca(int s, int e) {
if (dep[s] < dep[e]) swap(s, e);
for (int i = 19; i >= 0; i--)
if (dep[par[i][s]] >= dep[e])
s = par[i][s];
if (s == e) return s;
for (int i = 19; i >= 0; i--)
if (par[i][s] != par[i][e])
s = par[i][s], e = par[i][e];
return par[0][s];
}
void order() {
sort(all(ids), [&](int i, int j) { return dfn[i] < dfn[j]; });
}
void dfs(int x) {
seen[x] = true;
for (auto& y : adj[x]) {
if (seen[y[0]]) continue;
dist[y[0]] = dist[x] + y[1];
dfs(y[0]);
}
}
void build() {
for (int i = 0; i + 1 < k; i++) {
int x = ids[i];
int y = ids[i + 1];
int z = getlca(ids[i], ids[i + 1]);
adj[x].push_back({z, -c[i]});
adj[z].push_back({x, c[i]});
adj[y].push_back({z, -d[i]});
adj[z].push_back({y, d[i]});
}
vector<int> ord(n);
iota(all(ord), 0);
sort(all(ord), [&](int i, int j) { return dfn[i] < dfn[j]; });
for (int x : ord) if (!seen[x]) dfs(x);
}
lint query(int x, int y) {
return dist[x] + dist[y] - 2 * dist[getlca(x, y)];
}
} tree2;
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
cin >> n >> k >> q >> t;
for (int i = 0; i < n; i++) {
int p;
cin >> p;
if (p == -1) {
r1 = i;
} else {
--p;
tree1.add(i, p);
}
}
for (int i = 0; i < n; i++) {
int p;
cin >> p;
if (p == -1) {
r2 = i;
} else {
--p;
tree2.add(i, p);
}
}
tree1.dfs(r1, r1);
tree2.dfs(r2, r2);
tree2.order();
for (int i = 0; i < k; i++) {
cout << ids[i] + 1 << " ";
}
cout << "\n";
for (int i = 0; i + 1 < k; i++) {
cout << "? " << ids[i] + 1 << " " << ids[i + 1] + 1 << "\n";
}
cout << "!" << endl;
for (int i = 0; i + 1 < k; i++) {
cin >> a[i] >> b[i] >> c[i] >> d[i];
}
tree1.build();
tree2.build();
vector<int> x(t), y(t);
for (int i = 0; i < t; i++) {
cin >> x[i] >> y[i];
--x[i]; --y[i];
}
for (int i = 0; i < t; i++) {
cout << tree1.query(x[i], y[i]) << " " << tree2.query(x[i], y[i]) << "\n";
}
cout << endl;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
3034 ms |
346868 KB |
Output is correct |
2 |
Execution timed out |
3574 ms |
351468 KB |
Time limit exceeded |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
3553 ms |
351320 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1542 ms |
342108 KB |
Output is correct |
2 |
Correct |
1761 ms |
338808 KB |
Output is correct |
3 |
Correct |
1263 ms |
325616 KB |
Output is correct |
4 |
Correct |
1241 ms |
320404 KB |
Output is correct |
5 |
Correct |
1286 ms |
325516 KB |
Output is correct |
6 |
Correct |
1567 ms |
326212 KB |
Output is correct |
7 |
Correct |
1633 ms |
327464 KB |
Output is correct |
8 |
Correct |
1517 ms |
325840 KB |
Output is correct |
9 |
Correct |
1436 ms |
329980 KB |
Output is correct |
10 |
Correct |
1397 ms |
328688 KB |
Output is correct |
11 |
Correct |
1322 ms |
327916 KB |
Output is correct |
12 |
Correct |
1412 ms |
327868 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
3524 ms |
395928 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
3594 ms |
394452 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |