結果
問題 | No.399 動的な領主 |
ユーザー | pitP |
提出日時 | 2023-02-11 20:44:02 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 681 ms / 2,000 ms |
コード長 | 5,144 bytes |
コンパイル時間 | 4,403 ms |
コンパイル使用メモリ | 277,684 KB |
実行使用メモリ | 25,744 KB |
最終ジャッジ日時 | 2024-07-08 07:30:12 |
合計ジャッジ時間 | 11,596 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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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 | 2 ms
6,812 KB |
testcase_01 | AC | 2 ms
6,944 KB |
testcase_02 | AC | 1 ms
6,940 KB |
testcase_03 | AC | 2 ms
6,944 KB |
testcase_04 | AC | 4 ms
6,944 KB |
testcase_05 | AC | 40 ms
6,944 KB |
testcase_06 | AC | 615 ms
21,260 KB |
testcase_07 | AC | 605 ms
21,248 KB |
testcase_08 | AC | 617 ms
21,392 KB |
testcase_09 | AC | 618 ms
21,352 KB |
testcase_10 | AC | 5 ms
6,940 KB |
testcase_11 | AC | 32 ms
6,944 KB |
testcase_12 | AC | 451 ms
22,160 KB |
testcase_13 | AC | 433 ms
22,160 KB |
testcase_14 | AC | 109 ms
25,744 KB |
testcase_15 | AC | 156 ms
25,744 KB |
testcase_16 | AC | 266 ms
23,440 KB |
testcase_17 | AC | 681 ms
21,396 KB |
testcase_18 | AC | 621 ms
21,392 KB |
ソースコード
#include <bits/stdc++.h> #include <atcoder/all> using namespace std; using namespace atcoder; istream &operator>>(istream &is, modint &a) { long long v; is >> v; a = v; return is; } ostream &operator<<(ostream &os, const modint &a) { return os << a.val(); } istream &operator>>(istream &is, modint998244353 &a) { long long v; is >> v; a = v; return is; } ostream &operator<<(ostream &os, const modint998244353 &a) { return os << a.val(); } istream &operator>>(istream &is, modint1000000007 &a) { long long v; is >> v; a = v; return is; } ostream &operator<<(ostream &os, const modint1000000007 &a) { return os << a.val(); } typedef long long ll; typedef vector<vector<int>> Graph; typedef pair<int, int> pii; typedef pair<ll, ll> pll; #define rep(i,n) for (int i = 0;i < (int)(n); i++) #define all(x) x.begin(), x.end() #define rall(x) x.rbegin(), x.rend() #define my_sort(x) sort(x.begin(), x.end()) #define my_max(x) *max_element(all(x)) #define my_min(x) *min_element(all(x)) template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; } template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; } const int INF = (1<<30) - 1; const ll LINF = (1LL<<62) - 1; const int MOD = 998244353; const int MOD2 = 1e9+7; const double PI = acos(-1); vector<int> di = {1,0,-1,0}; vector<int> dj = {0,1,0,-1}; template<typename T> void print_2dvector(vector<vector<T>> &vec){ int H = vec.size(); for(int i=0;i<H;i++){ cout << i << ' ' << '['; for(int j=0;j<vec[i].size();j++){ if (j) cout << ',' << ' '; cout << vec[i][j]; } cout << ']' << endl; } } template<typename T> void print_vector(vector<T> &vec){ int N = vec.size(); cout << '['; for(int i=0;i<N;i++){ if (i) cout << ',' << ' '; cout << vec[i]; } cout << ']' << endl; } #ifdef LOCAL # include <debug_print.hpp> # define debug(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__) #else # define debug(...) (static_cast<void>(0)) #endif class heavy_light_decomposition { const int n; vector<vector<int>> g; vector<int> in, out, size, head, par; int it; void erase_par(int v, int prev) { par[v] = prev; for (auto& u : g[v]) { if (u == g[v].back()) break; if (u == prev) swap(u, g[v].back()); erase_par(u, v); } g[v].pop_back(); } void dfs1(int v) { for (auto& u : g[v]) { dfs1(u); size[v] += size[u]; if (size[u] > size[g[v][0]]) swap(u, g[v][0]); } } void dfs2(int v) { in[v] = it++; for (auto u : g[v]) { head[u] = (u == g[v][0] ? head[v] : u); dfs2(u); } out[v] = it; } public: heavy_light_decomposition(int n_) : n(n_), g(n), in(n, -1), out(n, -1), size(n, 1), head(n), par(n, -1), it(0) {} heavy_light_decomposition(const vector<vector<int>>& G) : n(G.size()), g(G), in(n, -1), out(n, -1), size(n, 1), head(n), par(n, -1), it(0) {} void add_edge(int u, int v) { g[u].push_back(v); g[v].push_back(u); } void build(int rt = 0) { for (auto v : g[rt]) erase_par(v, rt); dfs1(rt); head[rt] = rt; dfs2(rt); } int get_id(int v) { return in[v]; } int get_lca(int u, int v) { while (true) { if (in[u] > in[v]) swap(u, v); if (head[u] == head[v]) return u; v = par[head[v]]; } } void path_query(int u, int v, function<void(int, int)> f) { while (true) { if (in[u] > in[v]) swap(u, v); f(max(in[head[v]], in[u]), in[v] + 1); if (head[u] == head[v]) return; v = par[head[v]]; } } void subtree_query(int v, function<void(int, int)> f) { f(in[v], out[v]); } }; // https://kazuma8128.hatenablog.com/entry/2018/07/16/010500 struct S{ long long value; int size; }; using F = long long; S op(S a, S b){ return {a.value+b.value, a.size+b.size}; } S e(){ return {0, 0}; } S mapping(F f, S x){ return {x.value + f*x.size, x.size}; } F composition(F f, F g){ return f+g; } F id(){ return 0; } // https://atcoder.jp/contests/abc138/submissions/38777632 int main(){ cin.tie(0); ios_base::sync_with_stdio(false); int N; cin >> N; Graph g(N); lazy_segtree<S,op,e,F,mapping,composition,id> seg(N); rep(i,N) seg.set(i,S{0,1}); rep(i,N-1){ int a,b; cin >> a >> b; a--; b--; g[a].push_back(b); g[b].push_back(a); } heavy_light_decomposition hld(g); hld.build(); ll ans = 0ll; int Q; cin >> Q; while(Q--){ int a,b; cin >> a >> b; a--; b--; hld.path_query(a,b,[&](int l, int r){ans += seg.prod(l,r).value + seg.prod(l,r).size;}); hld.path_query(a,b,[&](int l, int r){seg.apply(l,r,1);}); debug(ans,Q); for(int i=0;i<N;i++){ debug(seg.get(hld.get_id(i)).value, i); } } cout << ans << endl; }