제출 #370281

#제출 시각아이디문제언어결과실행 시간메모리
370281Return_0공장들 (JOI14_factories)C++17
33 / 100
8042 ms229464 KiB
// #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, w] : adj[v]) if (!hide[u] && u != pr) sz[v] += plant(u, v); return sz[v]; } inline ll find_centroid (ll v, cl &_n, ll pr = -1) { for (ll i = 0, u; i < SZ(adj[v]); i++) { u = adj[v][i].fr; if (sz[u] << 1 > _n && !hide[u] && u != pr) pr = v, v = u, 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) { 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(); } 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
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