結果
問題 | No.1094 木登り / Climbing tree |
ユーザー | 👑 CleyL |
提出日時 | 2024-02-11 01:48:39 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 1,002 ms / 2,000 ms |
コード長 | 5,826 bytes |
コンパイル時間 | 1,786 ms |
コンパイル使用メモリ | 154,652 KB |
実行使用メモリ | 101,276 KB |
最終ジャッジ日時 | 2024-09-28 17:24:10 |
合計ジャッジ時間 | 27,260 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
(要ログイン)
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 | 1 ms
6,816 KB |
testcase_01 | AC | 885 ms
80,596 KB |
testcase_02 | AC | 342 ms
101,276 KB |
testcase_03 | AC | 227 ms
7,296 KB |
testcase_04 | AC | 255 ms
37,384 KB |
testcase_05 | AC | 406 ms
71,452 KB |
testcase_06 | AC | 490 ms
26,996 KB |
testcase_07 | AC | 918 ms
80,592 KB |
testcase_08 | AC | 911 ms
80,736 KB |
testcase_09 | AC | 923 ms
80,528 KB |
testcase_10 | AC | 947 ms
80,552 KB |
testcase_11 | AC | 995 ms
80,696 KB |
testcase_12 | AC | 942 ms
80,672 KB |
testcase_13 | AC | 933 ms
80,620 KB |
testcase_14 | AC | 948 ms
80,692 KB |
testcase_15 | AC | 496 ms
25,052 KB |
testcase_16 | AC | 710 ms
79,900 KB |
testcase_17 | AC | 590 ms
47,876 KB |
testcase_18 | AC | 551 ms
37,636 KB |
testcase_19 | AC | 659 ms
64,472 KB |
testcase_20 | AC | 1,002 ms
80,656 KB |
testcase_21 | AC | 607 ms
50,956 KB |
testcase_22 | AC | 978 ms
80,696 KB |
testcase_23 | AC | 926 ms
80,560 KB |
testcase_24 | AC | 933 ms
80,668 KB |
testcase_25 | AC | 905 ms
80,784 KB |
testcase_26 | AC | 908 ms
80,672 KB |
ソースコード
//yukicoder@cpp17 #include <iostream> #include <iomanip> #include <algorithm> #include <cmath> #include <cctype> #include <climits> #include <cassert> #include <string> #include <vector> #include <set> #include <stack> #include <queue> #include <map> #include <random> #include <bitset> #include <complex> #include <utility> #include <numeric> #include <functional> using namespace std; using ll = long long; using P = pair<ll,ll>; const ll MOD = 998244353; const ll MODx = 1000000007; const int INF = (1<<30)-1; const ll LINF = (1LL<<62LL)-1; const double EPS = (1e-10); P ar4[4] = {{0,1},{0,-1},{1,0},{-1,0}}; P ar8[8] = {{-1,-1},{-1,0},{-1,1},{0,-1},{0,1},{1,-1},{1,0},{1,1}}; template <typename T> vector<T> make_vector(size_t a, T b) { return vector<T>(a, b); } template <typename... Ts> auto make_vector(size_t a, Ts... ts) { return vector<decltype(make_vector(ts...))>(a, make_vector(ts...)); } /* 確認ポイント cout << fixed << setprecision(n) << 小数計算//n桁の小数表記になる 計算量は変わらないが楽できるシリーズ min(max)_element(iter,iter)で一番小さい(大きい)値のポインタが帰ってくる count(iter,iter,int)でintがiterからiterの間にいくつあったかを取得できる */ /* comment outed because can cause bugs __attribute__((constructor)) void initial() { cin.tie(0); ios::sync_with_stdio(false); } */ template< typename T, typename F> struct SegmentTree{ private: int n; vector<T> node; F f; T initer; public: SegmentTree(int n_, F f, T initer) : f(f),initer(initer) { n = 1; while(n < n_)n*=2; node.resize(2*n-1, initer); } SegmentTree(int n_, F f,T initer, vector<T> x) : f(f),initer(initer) { n = 1; while(n < n_)n*=2; node.resize(2*n-1, initer); set(x); } void set(vector<T> x){ for(int i = 0; (int)x.size() > i; i++){ update(i,x[i]); } } void update(int x, T val){ x += (n-1); node[x] = val; while(x > 0){ x = (x-1)/2; node[x] = f(node[2*x+1],node[2*x+2]); } } void add(int x, T val){ x += (n-1); node[x] += val; while(x > 0){ x = (x-1)/2; node[x] = f(node[2*x+1],node[2*x+2]); } } T getf(int a,int b, int k=0, int l=0, int r=-1){ if(r < 0){ r = n-1; } if(r < a || b < l){ return initer; } if(a <= l && r <= b){ return node[k]; } T vl = getf(a,b,2*k+1,l,(l+r)/2); T vr = getf(a,b,2*k+2,(l+r)/2+1,r); return f(vl,vr); } void debug(){ int nw = 1; int curr = 1; cout << "---begin---" << endl; for(int i = 0; 2*n-1 > i; i++){ cout << node[i] << " "; if(nw == curr)cout << endl,nw *= 2, curr=1; else curr++; } cout << "---end---" << endl; } }; template <typename T, typename F> SegmentTree<T, F> get_segment_tree(int N, const F &f, T initer){ return SegmentTree<T,F>{N,f,initer}; } template <typename T, typename F> SegmentTree<T, F> get_segment_tree(int N, const F &f, T initer, vector<T> x){ return SegmentTree<T,F>{N,f,initer,x}; } struct EulerTourForLCA { int n; vector<vector<int>> edge; vector<pair<int, int>> timeline; vector<pair<int,int>> stump; vector<int> parent; EulerTourForLCA(int n, vector<vector<int>> edge): n(n), edge(edge), timeline(2*n, {-1, 0}), stump(n, {-1,-1}), parent(n, 0), lock(n, false) {} void build(int top){ timer = 0; lock.assign(n, false); lock[top] = true; dfs(top, 0); } const pair<int,int> operator[](int index){ return stump[index]; } private: vector<bool> lock; int timer = 0; void dfs(int vertex, int depth){ stump[vertex].first = timer; timeline[timer].first = vertex; timeline[timer].second = depth; timer++; for(int i = 0; (int)edge[vertex].size() > i; i++){ if(!lock[edge[vertex][i]]){ lock[edge[vertex][i]] = true; parent[edge[vertex][i]] = vertex; dfs(edge[vertex][i], depth+1); } } stump[vertex].second = timer; timeline[timer].first = parent[vertex]; timeline[timer].second = depth-1; timer++; } }; struct LowestCommonAncestor { int n; vector<vector<int>> edge; EulerTourForLCA et; function<pair<int,int>(pair<int,int>, pair<int,int>)> RMQ = [](pair<int,int> a, pair<int,int> b){ if(a.second < b.second)return a; return b; }; //function<const pair<int,int>> RMQ = [](pair<int,int> a, pair<int,int> b){ //}; SegmentTree<pair<int,int>, decltype(RMQ)> st; LowestCommonAncestor(int n, vector<vector<int>> edge):n(n), edge(edge), et(n, edge), st(2*n, RMQ, {n+1, n+1}){ et.build(0); st.set(et.timeline); } int compute(int l, int r){ auto ls = et[l].first; auto rs = et[r].first; if(ls > rs)swap(ls, rs); auto mn = st.getf(ls, rs); return mn.first; } }; using LCA = LowestCommonAncestor; vector<vector<int>> A; vector<vector<pair<int,int>>> Ac; vector<int> dist; vector<int> vis; void dfs(int nw, int x){ dist[nw] = x; for(int i = 0; A[nw].size() > i; i++){ if(vis[A[nw][i]])continue; vis[A[nw][i]] = 1; dfs(A[nw][i], x+Ac[nw][i].second); } } int main(){ int n;cin>>n; A.assign(n, vector<int>()); Ac.assign(n, vector<pair<int,int>>()); dist.assign(n, 0); vis.assign(n, 0); for(int i = 0; n-1 > i; i++){ int a,b,c;cin>>a>>b>>c;a--;b--; A[a].push_back(b); A[b].push_back(a); Ac[a].push_back({b,c}); Ac[b].push_back({a,c}); } vis[0] = 1; dfs(0,0); LCA lca(n, A); int q;cin>>q; for(int i = 0; q > i; i++){ int s,t;cin>>s>>t;s--;t--; int z = lca.compute(s,t); cout << dist[s]+dist[t]-2*dist[z] << endl; } return 0; }