結果
問題 | No.898 tri-βutree |
ユーザー | knshnb |
提出日時 | 2019-10-04 21:38:42 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 241 ms / 4,000 ms |
コード長 | 5,351 bytes |
コンパイル時間 | 3,456 ms |
コンパイル使用メモリ | 206,104 KB |
実行使用メモリ | 34,480 KB |
最終ジャッジ日時 | 2024-11-08 21:56:10 |
合計ジャッジ時間 | 9,319 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 93 ms
34,480 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 2 ms
5,248 KB |
testcase_03 | AC | 2 ms
5,248 KB |
testcase_04 | AC | 3 ms
5,248 KB |
testcase_05 | AC | 2 ms
5,248 KB |
testcase_06 | AC | 2 ms
5,248 KB |
testcase_07 | AC | 230 ms
25,652 KB |
testcase_08 | AC | 229 ms
25,776 KB |
testcase_09 | AC | 234 ms
25,644 KB |
testcase_10 | AC | 236 ms
25,648 KB |
testcase_11 | AC | 235 ms
25,640 KB |
testcase_12 | AC | 237 ms
25,648 KB |
testcase_13 | AC | 238 ms
25,776 KB |
testcase_14 | AC | 237 ms
25,780 KB |
testcase_15 | AC | 236 ms
25,776 KB |
testcase_16 | AC | 230 ms
25,776 KB |
testcase_17 | AC | 229 ms
25,648 KB |
testcase_18 | AC | 239 ms
25,648 KB |
testcase_19 | AC | 226 ms
25,648 KB |
testcase_20 | AC | 233 ms
25,648 KB |
testcase_21 | AC | 241 ms
25,776 KB |
ソースコード
#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; template <class T> using treap = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>; #define int long long #define REP(i, n) for (long long i = 0, max_i = (n); i < max_i; i++) #define REPI(i, a, b) for (long long i = (a), max_i = (b); i < max_i; i++) #define ALL(obj) begin(obj), end(obj) #define RALL(obj) rbegin(obj), rend(obj) #define fi first #define se second using ii = pair<int, int>; vector<ii> dirs = { {1, 0}, {0, 1}, {-1, 0}, {0, -1}, // 4方向 {1, 1}, {-1, 1}, {-1, -1}, {1, -1}, // 斜め {0, 0}, // 自身 }; template <class T> inline bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } return false; } template <class T> inline bool chmin(T& a, const T& b) { if (a > b) { a = b; return true; } return false; } template <class T, class S> vector<T> make_vec(size_t n, S x) { return vector<T>(n, x); } template <class T, class... Ts> auto make_vec(size_t n, Ts... ts) { return vector<decltype(make_vec<T>(ts...))>(n, make_vec<T>(ts...)); } // debug template <class T> ostream& operator<<(ostream& s, vector<T>& d) { REP (i, d.size()) s << d[i] << (i == d.size() - 1 ? "" : " "); return s; } template <class T> ostream& operator<<(ostream& s, vector<vector<T>>& d) { REP (i, d.size()) s << d[i] << (i == d.size() - 1 ? "" : "\n"); return s; } template <class T, class S> ostream& operator<<(ostream& s, pair<T, S>& p) { s << "{" << p.first << ", " << p.second << "}"; return s; } template <class T> ostream& operator<<(ostream& s, set<T> m) { for (auto it = m.begin(); it != m.end(); it++) { s << *it << (next(it) == m.end() ? "" : "\n"); } return s; } template <class T> ostream& operator<<(ostream& s, multiset<T> m) { for (auto it = m.begin(); it != m.end(); it++) { s << *it << (next(it) == m.end() ? "" : "\n"); } return s; } template <class T, class S> ostream& operator<<(ostream& s, map<T, S> m) { for (auto it = m.begin(); it != m.end(); it++) { s << *it << (next(it) == m.end() ? "" : "\n"); } return s; } template <class T, class S> ostream& operator<<(ostream& s, unordered_map<T, S> m) { for (auto it = m.begin(); it != m.end(); it++) { s << *it << (next(it) == m.end() ? "" : "\n"); } return s; } #ifdef _MY_DEBUG #define dump(...) cerr << "/* " << #__VA_ARGS__ << " :[" << __LINE__ << ":" << __FUNCTION__ << "]" << endl, dump_func(__VA_ARGS__), cerr << "*/\n\n"; #else #define dump(...) #define endl "\n" #endif void dump_func() { cerr << endl; } template <class Head, class... Tail> void dump_func(Head&& h, Tail&&... t) { cerr << h << (sizeof...(Tail) == 0 ? "" : ", "), dump_func(forward<Tail>(t)...); } struct Fast { Fast() { cin.tie(nullptr); ios::sync_with_stdio(false); } } fast; mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count()); constexpr int MOD = 1000000007; // *************** TEMPLATE END *************** // edgeを貼ったあとにbuild()を忘れない! struct TreeDoubling { struct Edge { int to, len; }; // 場合に応じて書き換える、toは必須 vector<vector<Edge>> g; int n, size; // MSB + 1 int root; vector<int> depth; vector<vector<int>> parent; // ダミー頂点n(親もn) TreeDoubling(int n) : g(n), n(n), depth(n), size(64 - __builtin_clzll(n)) { parent.resize(size, vector<int>(n + 1, n)); } void dfs(int v, int prev, int d) { depth[v] = d; parent[0][v] = prev; for (auto& s : g[v]) if (s.to != prev) { dfs(s.to, v, d + 1); } } void build(int root_ = 0) { root = root_; dfs(root, n, 0); for (int k = 0; k < size - 1; k++) { for (int i = 0; i < n; i++) { parent[k + 1][i] = parent[k][parent[k][i]]; } } } // vからd個分親にさかのぼった頂点、rootよりも上はnを返す int query(int v, int d) { int ret = v; for (int j = 0; j < size; j++) { if (d >> j & 1) ret = parent[j][ret]; } return ret; } int lca(int u, int v) { if (depth[u] > depth[v]) swap(u, v); v = query(v, depth[v] - depth[u]); if (u == v) return u; for (int j = size - 1; j >= 0; j--) { if (parent[j][u] == parent[j][v]) continue; u = parent[j][u]; v = parent[j][v]; } assert(parent[0][u] == parent[0][v]); return parent[0][u]; } }; signed main() { int n; cin >> n; TreeDoubling td(n); REP (i, n - 1) { int u, v, w; cin >> u >> v >> w; // td.g[u].emplace_back(v, w); td.g[u].push_back({v, w}); td.g[v].push_back({u, w}); } td.build(); vector<int> d(n); function<void(int, int)> dfs = [&](int v, int prev) { for (auto& p : td.g[v]) if (p.to != prev) { d[p.to] = d[v] + p.len; dfs(p.to, v); } }; dfs(0, -1); int Q; cin >> Q; REP (q, Q) { int x, y, z; cin >> x >> y >> z; int ans = d[x] + d[y] + d[z]; int xy = td.lca(x, y); int yz = td.lca(y, z); int zx = td.lca(z, x); ans -= d[xy] + d[yz] + d[zx]; cout << ans << endl; } }