// #pragma GCC optimize("Ofast,unroll-loops")
// #pragma comment(linker, "/stack:200000000")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,fma,tune=native")
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#ifndef SINA
#include "factories.h"
#endif
using namespace std;
using namespace __gnu_pbds;
typedef int ll;
typedef long double ld;
typedef pair <ll, ll> pll;
#ifdef SINA
#define dbg(...) __f(#__VA_ARGS__, __VA_ARGS__)
template <typename Arg1> void __f(const char* name, Arg1&& arg1) { cout << name << " : " << arg1 << std::endl; }
template <typename Arg1, typename... Args> void __f (const char* names, Arg1&& arg1, Args&&... args) {
const char* comma = strchr(names + 1, ',');cout.write(names, comma - names) << " : " << arg1<<" | ";__f(comma+1, args...); }
#define dbg2(x, j, n) cout<< #x << " : "; output((j), (n), x, 1); cout.flush();
#else
#define dbg(...) 0
#define dbg2(x, j, n) 0
#endif
#define SZ(x) ((ll)((x).size()))
#define File(s, t) freopen(s ".txt", "r", stdin); freopen(t ".txt", "w", stdout);
#define input(j, n, a) for (int _i = (j); _i < (n)+(j); _i++) cin>> a[_i];
#define output(j, n, a, t) for (int _i = (j); _i < (n)+(j); _i++) cout<< a[_i] << (((t) && _i != (n)+(j)-1)? ' ' : '\n');
#define kill(x) return cout<< (x) << endl, 0
#define cl const ll
#define fr first
#define sc second
#define lc (v << 1)
#define rc (lc | 1)
#define mid ((l + r) >> 1)
#define All(x) (x).begin(), (x).end()
const long long inf = sizeof(long long) == 4 ? (1e9 + 10) : (3e18), mod = 1e9 + 7, MOD = 998244353;
template <class A,class B> ostream& operator << (ostream& out,const pair<A,B>&a){return out<<'('<<a.first<<", "<<a.second<<')';}
template <class A> ostream& operator << (ostream& out, const vector<A> &a) {
out<< '['; for (int i = -1; ++i < int(a.size());) out<< a[i] << (i + 1 < int(a.size()) ? ", " : ""); return out<<']'; }
template <class T, typename _t = less <T> > using Tree = tree <T, null_type, _t, rb_tree_tag, tree_order_statistics_node_update>;
cl N = 5e5 + 7, lg = 20;
ll sz [N], cen [N][lg], wcen [N], n, cur1, cur2;
long long dist [N][lg], rn [N], bn [N];
vector <pll> adj [N];
bool hide [N];
ll plant (cl &v, cl &pr = -1) {
sz[v] = 1;
for (auto &u : adj[v]) if (!hide[u.fr] && u.fr != pr) sz[v] += plant(u.fr, v);
return sz[v];
}
inline ll find_centroid (ll v, cl &_n, ll pr = -1) {
for (ll i = 0; i < SZ(adj[v]); i++) if (sz[adj[v][i].fr] << 1 > _n && !hide[adj[v][i].fr] && adj[v][i].fr != pr)
pr = v, v = adj[v][i].fr, i = -1;
return v;
}
void dfs (cl &v, cl &pr) {
cen[v][cur2] = cur1;
for (auto [u, w] : adj[v]) if (!hide[u] && u != pr) dist[u][cur2] = dist[v][cur2] + w, dfs(u, v);
}
void centroid_decomposition (ll v = 0, cl &lev = 0) {
assert(lev < lg);
v = find_centroid(v, plant(v)); cur1 = v; cur2 = lev;
wcen[v] = lev;
cen[v][lev] = v;
for (auto [u, w] : adj[v]) if (!hide[u]) dist[u][lev] = w, dfs(u, v);
hide[v] = 1;
for (auto [u, w] : adj[v]) if (!hide[u]) centroid_decomposition(u, lev + 1);
}
void Init (ll N, ll A[], ll B[], ll D[]) {
memset(rn, 61, sizeof rn);
memset(bn, 61, sizeof bn);
n = N;
for (ll i = 0; i < n - 1; i++) adj[A[i]].push_back({B[i], D[i]}), adj[B[i]].push_back({A[i], D[i]});
centroid_decomposition();
assert((1000 * clock() / CLOCKS_PER_SEC) < 3000);
}
long long Query (ll S, ll X[], ll T, ll Y[]) {
long long ans = inf;
for (ll i = 0; i < S; i++) for (ll v = X[i], lev = wcen[v]; ~lev; lev--) {
v = cen[v][lev];
rn[v] = min(rn[v], dist[X[i]][lev]);
}
for (ll i = 0; i < T; i++) for (ll v = Y[i], lev = wcen[v]; ~lev; lev--) {
v = cen[v][lev];
bn[v] = min(bn[v], dist[Y[i]][lev]);
ans = min(ans, rn[v] + bn[v]);
}
for (ll i = 0; i < S; i++) for (ll v = X[i], lev = wcen[v]; ~lev; lev--) {
v = cen[v][lev];
rn[v] = inf;
}
for (ll i = 0; i < T; i++) for (ll v = Y[i], lev = wcen[v]; ~lev; lev--) {
v = cen[v][lev];
bn[v] = inf;
}
return ans;
}
#ifdef SINA
ll A [100], B [100], D[100];
int main ()
{
ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
ll _n, q;
cin>> _n >> q;
for (ll i = 0; i < _n - 1; i++) {
cin>> A[i] >> B[i] >> D[i];
}
Init(_n, A, B, D);
while (q--) {
ll s, t;
cin>> s >> t;
for (ll i = 0; i < s; i++) cin>> A[i];
for (ll i = 0; i < t; i++) cin>> B[i];
cout<< Query(s, A, t, B) << '\n';
}
cerr<< "\nTime elapsed: " << 1000 * clock() / CLOCKS_PER_SEC << "ms\n";
return 0;
}
/*
7 3
0 1 4
1 2 4
2 3 5
2 4 6
4 5 5
1 6 3
2 2
0 6
3 4
3 2
0 1 3
4 6
1 1
2
5
*/
#endif
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
22 ms |
20332 KB |
Output is correct |
| 2 |
Correct |
481 ms |
29368 KB |
Output is correct |
| 3 |
Correct |
546 ms |
29420 KB |
Output is correct |
| 4 |
Correct |
562 ms |
29564 KB |
Output is correct |
| 5 |
Correct |
639 ms |
29804 KB |
Output is correct |
| 6 |
Correct |
324 ms |
29548 KB |
Output is correct |
| 7 |
Correct |
591 ms |
29676 KB |
Output is correct |
| 8 |
Correct |
561 ms |
29420 KB |
Output is correct |
| 9 |
Correct |
694 ms |
29940 KB |
Output is correct |
| 10 |
Correct |
341 ms |
29548 KB |
Output is correct |
| 11 |
Correct |
592 ms |
29452 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
15 ms |
20204 KB |
Output is correct |
| 2 |
Correct |
2880 ms |
173228 KB |
Output is correct |
| 3 |
Correct |
4326 ms |
174852 KB |
Output is correct |
| 4 |
Correct |
948 ms |
174036 KB |
Output is correct |
| 5 |
Runtime error |
4346 ms |
395372 KB |
Execution killed with signal 6 |
| 6 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
22 ms |
20332 KB |
Output is correct |
| 2 |
Correct |
481 ms |
29368 KB |
Output is correct |
| 3 |
Correct |
546 ms |
29420 KB |
Output is correct |
| 4 |
Correct |
562 ms |
29564 KB |
Output is correct |
| 5 |
Correct |
639 ms |
29804 KB |
Output is correct |
| 6 |
Correct |
324 ms |
29548 KB |
Output is correct |
| 7 |
Correct |
591 ms |
29676 KB |
Output is correct |
| 8 |
Correct |
561 ms |
29420 KB |
Output is correct |
| 9 |
Correct |
694 ms |
29940 KB |
Output is correct |
| 10 |
Correct |
341 ms |
29548 KB |
Output is correct |
| 11 |
Correct |
592 ms |
29452 KB |
Output is correct |
| 12 |
Correct |
15 ms |
20204 KB |
Output is correct |
| 13 |
Correct |
2880 ms |
173228 KB |
Output is correct |
| 14 |
Correct |
4326 ms |
174852 KB |
Output is correct |
| 15 |
Correct |
948 ms |
174036 KB |
Output is correct |
| 16 |
Runtime error |
4346 ms |
395372 KB |
Execution killed with signal 6 |
| 17 |
Halted |
0 ms |
0 KB |
- |
