結果
問題 | No.898 tri-βutree |
ユーザー | stoq |
提出日時 | 2020-03-31 05:55:43 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 243 ms / 4,000 ms |
コード長 | 3,737 bytes |
コンパイル時間 | 2,200 ms |
コンパイル使用メモリ | 178,028 KB |
実行使用メモリ | 44,800 KB |
最終ジャッジ日時 | 2024-11-08 23:33:53 |
合計ジャッジ時間 | 8,418 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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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 | 120 ms
44,800 KB |
testcase_01 | AC | 38 ms
33,024 KB |
testcase_02 | AC | 34 ms
33,152 KB |
testcase_03 | AC | 32 ms
33,024 KB |
testcase_04 | AC | 33 ms
33,024 KB |
testcase_05 | AC | 34 ms
33,152 KB |
testcase_06 | AC | 32 ms
33,152 KB |
testcase_07 | AC | 237 ms
39,424 KB |
testcase_08 | AC | 237 ms
39,552 KB |
testcase_09 | AC | 227 ms
39,680 KB |
testcase_10 | AC | 231 ms
39,424 KB |
testcase_11 | AC | 236 ms
39,424 KB |
testcase_12 | AC | 236 ms
39,424 KB |
testcase_13 | AC | 235 ms
39,296 KB |
testcase_14 | AC | 236 ms
39,680 KB |
testcase_15 | AC | 235 ms
39,424 KB |
testcase_16 | AC | 235 ms
39,424 KB |
testcase_17 | AC | 224 ms
39,552 KB |
testcase_18 | AC | 227 ms
39,552 KB |
testcase_19 | AC | 243 ms
39,552 KB |
testcase_20 | AC | 231 ms
39,424 KB |
testcase_21 | AC | 238 ms
39,296 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; //#include <boost/multiprecision/cpp_int.hpp> //using multiInt = boost::multiprecision::cpp_int; using ll = long long int; using ld = long double; using pii = pair<int, int>; using pll = pair<ll, ll>; template <typename Q_type> using smaller_queue = priority_queue<Q_type, vector<Q_type>, greater<Q_type>>; const int MOD_TYPE = 1; const ll MOD = (MOD_TYPE == 1 ? (ll)(1e9 + 7) : 998244353); const int INF = (int)1e9; const ll LINF = (ll)4e18; const ld PI = acos(-1.0); const ld EPS = 1e-11; #define REP(i, m, n) for (ll i = m; i < (ll)(n); ++i) #define rep(i, n) REP(i, 0, n) #define MP make_pair #define MT make_tuple #define YES(n) cout << ((n) ? "YES" : "NO") << endl #define Yes(n) cout << ((n) ? "Yes" : "No") << endl #define Possible(n) cout << ((n) ? "Possible" : "Impossible") << endl #define possible(n) cout << ((n) ? "possible" : "impossible") << endl #define Yay(n) cout << ((n) ? "Yay!" : ":(") << endl #define all(v) v.begin(), v.end() #define NP(v) next_permutation(all(v)) #define dbg(x) cerr << #x << ":" << x << endl; vector<int> Dx = {0, 0, -1, 1, -1, 1, -1, 1, 0}; vector<int> Dy = {1, -1, 0, 0, -1, -1, 1, 1, 0}; struct Tree { const static int MAX_V = 200010; using P = pair<int, ll>; vector<P> E[MAX_V]; int par[MAX_V]; vector<int> ch[MAX_V]; int depth[MAX_V]; ll dist[MAX_V]; void add_E(int a, int b, ll w = 1, bool direction = false) { E[a].push_back(MP(b, w)); if (!direction) E[b].push_back(MP(a, w)); } void dfs(int p, int d, ll w, bool make_ch) { for (auto pi : E[p]) { int v = pi.first; if (par[v] != -2) continue; par[v] = p; depth[v] = d + 1; dist[v] = w + pi.second; if (make_ch) ch[p].push_back(v); dfs(v, d + 1, w + pi.second, make_ch); } } void make_tree(int root = 0, bool make_ch = false) { fill(par, par + MAX_V, -2); par[root] = -1; depth[root] = dist[root] = 0; dfs(root, 0, 0, make_ch); } int par_double[MAX_V][25]; //頂点iの2^k個上の頂点 bool calculated = false; void calc_double() { for (int i = 0; i < MAX_V; i++) par_double[i][0] = (par[i] < 0 ? -1 : par[i]); for (int k = 0; k < 24; k++) { for (int i = 0; i < MAX_V; i++) { if (par_double[i][k] == -1) par_double[i][k + 1] = -1; else par_double[i][k + 1] = par_double[par_double[i][k]][k]; } } } int getLCA(int a, int b) { if (!calculated) { calc_double(); calculated = true; } if (a == b) return a; if (depth[a] < depth[b]) swap(a, b); for (int k = 24; k >= 0; k--) { if (par_double[a][k] != -1 && depth[par_double[a][k]] >= depth[b]) { a = par_double[a][k]; } } if (a == b) return a; for (int k = 24; k >= 0; k--) { if (par_double[a][k] != -1 && par_double[a][k] != par_double[b][k]) { a = par_double[a][k]; b = par_double[b][k]; } } return par_double[a][0]; } inline ll length(int a, int b) { return depth[a] + depth[b] - 2 * depth[getLCA(a, b)]; } inline ll distance(int a, int b) { return dist[a] + dist[b] - 2 * dist[getLCA(a, b)]; } }; int main() { cin.tie(0); ios::sync_with_stdio(false); cout << setprecision(30) << setiosflags(ios::fixed); int n; cin >> n; Tree tr; rep(i, n - 1) { int u, v; ll w; cin >> u >> v >> w; tr.add_E(u, v, w); } tr.make_tree(0); int q; cin >> q; rep(qi, q) { int x, y, z; cin >> x >> y >> z; cout << (tr.distance(x, y) + tr.distance(y, z) + tr.distance(z, x)) / 2 << "\n"; } return 0; }