Submission #1293136

#TimeUsernameProblemLanguageResultExecution timeMemory
1293136tubicationSynchronization (JOI13_synchronization)C++20
100 / 100
230 ms18416 KiB
/* ⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠃⡀⡀⡀⠠⢄⣠⣴⣼⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣯⢿⣿⣿⣿⣾⣆⡀⡀⢻ ⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠟⡀⡀⠄⡐⣰⣷⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡄⣿⣿⣿⣿⣿⣷⡀⠈ ⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠉⡀⢀⣔⣷⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠘⣿⣿⣿⣿⣿⣿⡄ ⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⡀⢀⢢⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡆⣿⣿⣿⣿⣿⣿⣿ ⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠟⢀⣦⣿⠰⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⢿⣿⣿⣿⣿⣿⣿ ⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠋⡠⣷⣿⡟⢸⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⢸⣿⣿⣿⣿⣿⣿ ⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠁⣰⣿⣿⣿⠇⢼⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠈⣿⣿⣿⣿⣿⣿ ⣿⣿⣿⣿⣿⣿⣿⣿⣿⠁⣴⣿⣿⣿⣿⡀⢸⣿⣿⡏⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡇⡀⣿⣿⣿⣿⣿⣿ ⣿⣿⣿⣿⣿⣿⣿⣿⠁⣼⣿⣿⣿⣿⣿⡀⠐⣿⣿⠁⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡟⣿⣿⡀⡆⣿⣿⣿⣿⣿⣿ ⣿⣿⣿⣿⣿⣿⣿⡀⣺⣿⣿⣿⣿⣿⣿⡀⡀⢀⢈⡀⠈⢙⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠿⠿⠿⡀⠹⡿⣸⡇⢺⣿⣿⣿⢻⣿ ⣿⣿⣿⣿⣿⣿⠁⢰⣿⡅⠻⣿⣿⣿⣿⡀⣿⡀⣿⡀⠐⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣶⣶⠂⡀⣶⢁⣿⣯⢸⣿⣿⠇⢸⣿ ⣿⣿⣿⣿⣿⠁⡀⡀⢿⣿⡀⠉⢻⣿⣿⡇⣿⣷⡀⡀⣅⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠃⣼⡆⠋⣾⣿⣿⢸⣿⡿⡀⣾⣿ ⣿⣿⣿⣿⠃⢠⣮⡀⡀⣈⠃⠘⣦⣴⣦⣤⣾⣿⣿⣶⣿⡈⣿⡀⣿⣿⣿⣿⣿⣿⣿⣿⡿⢀⣾⣿⣁⣾⣿⣿⡟⠸⠋⡤⢀⣿⣿ ⣿⣿⣿⠃⢀⣾⣿⡧⠨⠿⠿⢿⣿⣿⣿⣿⣿⣿⣿⣿⣯⣽⡈⡆⠈⣿⣿⣿⣿⣿⡿⠁⣴⣿⣿⣿⣿⣿⣿⣿⣷⠿⢿⡗⢸⣿⠏ ⣿⣿⠏⡀⣽⣿⣿⡇⣀⡀⡀⡀⡀⡀⡀⡀⡀⡀⡀⡀⡀⡀⣿⣄⢸⣄⠻⡿⠟⢁⣴⣿⠁⡀⡀⡀⡀⡀⡀⡀⡀⡀⣀⠅⣿⡟⣠ ⣿⠏⡀⢲⣿⣿⣿⠇⣿⣿⡇⡀⡀⡀⡀⡀⡀⡀⡀⡀⡀⣿⣿⣿⣿⣿⣷⣴⣿⣿⣿⣿⡀⡀⡀⡀⡀⡀⡀⡀⡀⣿⡿⠘⣁⣾⣿ ⠟⡀⢔⣿⣿⣿⣿⠂⣿⣿⠁⡀⡀⡀⡀⡀⡀⡀⡀⡀⡀⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡇⡀⡀⡀⡀⡀⡀⡀⡀⢸⣿⣶⠠⣿⣿⣿ ⡀⡀⣺⣿⣿⣿⣿⡀⣿⣿⡀⡀⡀⡀⡀⡀⡀⡀⡀⡀⢸⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡀⡀⡀⡀⡀⡀⡀⡀⡀⣿⣿⠇⣼⣿⣿⣿ ⡀⡐⣿⣿⣿⣿⣿⡀⣿⣿⡀⡀⡀⡀⡀⡀⡀⡀⡀⡀⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡀⡀⡀⡀⡀⡀⡀⡀⢠⣿⣿⡀⣿⣿⣿⣿ ⡀⢿⣿⣿⣿⣿⣿⡂⢿⣿⣷⡀⡀⡀⡀⡀⡀⡀⡀⣴⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡀⡀⡀⡀⡀⡀⡀⢀⣿⣿⡏⢰⣿⣿⣿⣿ ⢀⣿⣿⣿⣿⣿⣿⡅⢸⣿⣿⣿⣷⣦⣤⣴⣶⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣦⣀⣀⣀⣤⣶⣿⣿⣿⡀⢼⣿⠫⣿⣿ ⢨⣿⣿⣿⣿⣿⣿⡧⠐⣿⣿⣿⣿⣿⣿⣿⠉⡉⠉⣉⣉⠉⣉⣉⢉⠉⢉⡉⠉⠉⠉⠉⠉⠉⢹⣿⣿⣿⣿⣿⡏⡀⣺⡟⢰⣿⣿ ⣸⣿⣿⣿⣿⣿⣿⣿⡀⣻⣿⣿⣿⣿⣿⣿⡆⣿⢸⣿⣿⡀⣿⣿⡟⡀⣿⣿⠁⣿⣿⡀⣿⠃⣼⣿⣿⣿⣿⡿⡀⡀⡿⠁⣾⣿⣿ ⢺⡟⣿⣿⣿⣿⣿⣿⡀⡀⠻⣿⣿⣿⣿⣿⣿⡈⢸⣿⣿⡀⣿⣿⣷⢸⣿⣿⡀⣿⣿⠰⠋⣴⣿⣿⣿⡿⠋⡀⡀⡀⠁⢠⣿⣿⣿ ⠸⡇⠹⣿⣿⣿⣿⣿⣇⡀⡀⡀⠛⢿⣿⣿⣿⣿⣄⠙⡿⢰⣿⣿⣿⢸⣿⣿⠠⡿⠋⣤⣿⣿⣿⠟⠉⡀⡀⡀⡀⡀⡀⣿⣿⣿⣿ ⡀⠈⡀⠙⢿⣿⣿⣿⣿⡀⡀⡀⡀⡀⡀⣈⠉⠛⠿⢿⣶⣤⣉⣙⢉⣉⣉⣁⣤⠾⠛⠋⠉⡀⡀⡀⡀⡀⢀⣠⣤⣴⠴⠷⠶⠚⠋ ⡀⡀⢰⣷⣄⡀⠛⠿⣿⣷⡀⣆⡀⡀⡀⠘⣿⣿⣿⣶⠖⣀⠲⣶⣶⣶⣶⠆⡀⡀⡀⡀⡀⡀⡀⡀⡀⡀⢀⡀⡀⡀⢈⠉⠉⠉⠉ ⡀⡀⡪⣿⣿⣧⡀⢠⣤⣀⡁⡀⡀⡀⡀⣆⠈⠿⠛⣠⣿⣿⣦⠈⢿⣿⡟⢠⡀⡀⡀⡀⡀⡀⡀⡀⢽⣿⠿⡿⣿⣿⢿⡿⣿⣿⣿ ⣀⡀⠱⣿⣿⣿⡀⣿⣿⣿⠟⡀⡀⡀⡀⣿⣿⣿⣿⣿⣿⣿⣿⣿⣦⣤⣴⣿⠇⡀⡀⡀⣄⡀⡠⡆⠘⣿⢸⣗⣥⣿⣿⣿⣰⣴⣬ ⠋⢠⣦⡀⡹⠻⣷⡟⠛⠁⡀⡀⡀⡀⡀⡀⡀⠉⠉⠋⠙⠛⠛⠛⠛⠛⠉⠉⡀⡀⡀⡀⢹⣦⠘⢿⡀⣿⡎⣾⣿⣫⡶⣾⡿⣽⣭ */ #include <bits/stdc++.h> #include <ext/pb_ds/assoc_container.hpp> #include <ext/pb_ds/tree_policy.hpp> using namespace std; using namespace __gnu_pbds; #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); } #define synchronize {ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);} #define ll long long #define ld long double #define ull unsigned long long #define pii pair <int, int> #define pli pair <ll, int> #define pil pair <int, ll> #define pll pair <ll, ll> #define vvi vector <vector <int>> #define all(v) (v).begin(), (v).end() #define __builtin_popcount __builtin_popcountll #define fi first #define se second template<class X, class Y> bool maximize(X &x, const Y &y) { if (x < y) { x = y; return true; } else return false; } template <class X, class Y> bool minimize(X &x, Y y) { if (x > y) { x = y; return true; } return false; } const int nmax = 3e5 + 5; const ll mod = 1e9 + 7; const ll inf = 1e18; mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count()); ll rngesus(ll l, ll r) { return uniform_int_distribution <long long>(l, r)(rng); } /** END OF TEMPLATE **/ struct seg_tree { int n; vector <bool> tree; void set(int n) { this->n = n; tree.assign(4 * n + 5, 0); } void update(int id, int l, int r, int pos, bool st) { if (l > pos || r < pos) return; if (l == r) { tree[id] = st; return; } int mid = (l + r) >> 1; update(2 * id, l, mid, pos, st); update(2 * id + 1, mid + 1, r, pos, st); tree[id] = (tree[2 * id] && tree[2 * id + 1]); } bool query(int id, int l, int r, int u, int v) { if (u > r || v < l) return true; if (u <= l && r <= v) return tree[id]; int mid = (l + r) >> 1; bool tl = query(2 * id, l, mid, u, v); bool tr = query(2 * id + 1, mid + 1, r, u, v); return (tl && tr); } int get_right(int id, int l, int r, int u, int v) { if (u > r || v < l) return -1; if (tree[id]) return -1; if (l == r) return l; int mid = (l + r) >> 1; int res = get_right(2 * id + 1, mid + 1, r, u, v); if (res == -1) res = get_right(2 * id, l, mid, u, v); return res; } void update(int pos, bool st) { update(1, 1, n, pos, st); } bool query(int l, int r) { return query(1, 1, n, l, r); } int get_right(int l, int r) { return get_right(1, 1, n, l, r); } }; int n, m, q; int u, v, d, c; pii edges[nmax]; vector <int> adj[nmax]; int sz[nmax], par[nmax], depth[nmax]; int chain_head[nmax], chain_id[nmax]; int pos[nmax], arr[nmax]; int cur_chain, cur_pos; void pre_dfs(int u, int p) { sz[u] = 1; par[u] = p; for (int v : adj[u]) { if (v == p) continue; depth[v] = depth[u] + 1; pre_dfs(v, u); sz[u] += sz[v]; } } void hld(int u, int p) { if (!chain_head[cur_chain]) { chain_head[cur_chain] = u; } chain_id[u] = cur_chain; pos[u] = cur_pos; arr[cur_pos] = u; cur_pos++; int nxt = -1; for (int v : adj[u]) { if (v != p && (nxt == -1 || sz[v] > sz[nxt])) { nxt = v; } } if (nxt != -1) hld(nxt, u); for (int v : adj[u]) { if (v != p && v != nxt) { cur_chain++; hld(v, u); } } } bool state[nmax]; seg_tree seg; int prv[nmax]; // record how this edge was use int res[nmax]; // the number of packet it handle int find(int u) { while (true) { int head = chain_head[chain_id[u]]; int l = pos[head], r = pos[u]; if (!seg.query(l, r)) { int idx = seg.get_right(l, r); return arr[idx]; } u = par[head]; } } int main() { synchronize; cin >> n >> m >> q; for (int i = 1; i < n; i++) { cin >> u >> v; adj[u].push_back(v); adj[v].push_back(u); edges[i] = {u, v}; } cur_chain = 1; cur_pos = 1; depth[1] = 1; pre_dfs(1, 0); hld(1, 0); seg.set(n); for (int i = 1; i < n; i++) { if (edges[i].fi != par[edges[i].se]) swap(edges[i].fi, edges[i].se); } for (int i = 1; i <= n; i++) res[i] = 1; for (int i = 1; i <= m; i++) { cin >> d; auto [u, v] = edges[d]; if (state[v] == false) { state[v] = true; seg.update(pos[v], true); int cnt = res[v] - prv[v]; prv[v] = res[v]; int vr = find(u); res[vr] += cnt; } else { state[v] = false; seg.update(pos[v], false); int vr = find(u); res[v] = res[vr]; prv[v] = res[vr]; } } for (int i = 1; i <= q; i++) { cin >> c; cout << res[find(c)] << '\n'; } return (0 ^ 0); }
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