結果
問題 | No.2949 Product on Tree |
ユーザー | pitP |
提出日時 | 2024-10-25 22:20:32 |
言語 | C++23(gcc13) (gcc 13.2.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 375 ms / 2,000 ms |
コード長 | 4,460 bytes |
コンパイル時間 | 6,518 ms |
コンパイル使用メモリ | 336,640 KB |
実行使用メモリ | 59,312 KB |
最終ジャッジ日時 | 2024-10-25 22:20:56 |
合計ジャッジ時間 | 23,193 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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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
6,816 KB |
testcase_01 | AC | 2 ms
6,816 KB |
testcase_02 | AC | 2 ms
6,816 KB |
testcase_03 | AC | 279 ms
29,952 KB |
testcase_04 | AC | 284 ms
29,496 KB |
testcase_05 | AC | 275 ms
30,256 KB |
testcase_06 | AC | 281 ms
30,256 KB |
testcase_07 | AC | 275 ms
29,688 KB |
testcase_08 | AC | 295 ms
30,784 KB |
testcase_09 | AC | 306 ms
31,340 KB |
testcase_10 | AC | 289 ms
32,176 KB |
testcase_11 | AC | 313 ms
32,832 KB |
testcase_12 | AC | 319 ms
37,716 KB |
testcase_13 | AC | 320 ms
38,676 KB |
testcase_14 | AC | 328 ms
42,264 KB |
testcase_15 | AC | 326 ms
47,060 KB |
testcase_16 | AC | 340 ms
43,644 KB |
testcase_17 | AC | 349 ms
44,868 KB |
testcase_18 | AC | 345 ms
44,624 KB |
testcase_19 | AC | 346 ms
48,836 KB |
testcase_20 | AC | 348 ms
47,736 KB |
testcase_21 | AC | 343 ms
48,468 KB |
testcase_22 | AC | 327 ms
50,392 KB |
testcase_23 | AC | 276 ms
30,572 KB |
testcase_24 | AC | 311 ms
30,652 KB |
testcase_25 | AC | 304 ms
30,648 KB |
testcase_26 | AC | 317 ms
30,748 KB |
testcase_27 | AC | 288 ms
31,068 KB |
testcase_28 | AC | 310 ms
31,112 KB |
testcase_29 | AC | 297 ms
31,564 KB |
testcase_30 | AC | 309 ms
32,912 KB |
testcase_31 | AC | 313 ms
35,184 KB |
testcase_32 | AC | 317 ms
35,212 KB |
testcase_33 | AC | 363 ms
42,344 KB |
testcase_34 | AC | 349 ms
51,072 KB |
testcase_35 | AC | 355 ms
45,740 KB |
testcase_36 | AC | 372 ms
54,780 KB |
testcase_37 | AC | 361 ms
55,496 KB |
testcase_38 | AC | 352 ms
49,528 KB |
testcase_39 | AC | 363 ms
50,464 KB |
testcase_40 | AC | 372 ms
58,528 KB |
testcase_41 | AC | 368 ms
53,276 KB |
testcase_42 | AC | 375 ms
59,312 KB |
testcase_43 | AC | 76 ms
22,828 KB |
testcase_44 | AC | 76 ms
23,312 KB |
testcase_45 | AC | 96 ms
27,136 KB |
testcase_46 | AC | 88 ms
25,284 KB |
testcase_47 | AC | 63 ms
18,988 KB |
testcase_48 | AC | 89 ms
25,800 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 FOR(i,l,r) for (int i = l;i < (int)(r); i++) #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}; #ifdef LOCAL # include <debug_print.hpp> # define debug(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__) #else # define debug(...) (static_cast<void>(0)) #endif using mint = modint998244353; template<class E, class V, E (*merge)(E, E), E (*e)(), E (*put_edge)(V, int), V (*put_vertex)(E, int)> struct RerootingDP { struct edge{ int from, to, idx, rev_idx; }; RerootingDP (int _n = 0) : n(_n) { es.resize(n);} void add_edge(int u, int v, int idx1, int idx2){ es[u].push_back({u,v,idx1,idx2}); es[v].push_back({v,u,idx2,idx1}); } V build(int v = 0){ root = v; vis.resize(n,0); outs.resize(n); return dfs(root); } vector<V> reroot(){ reverse_edge.resize(n); reverse_edge[root] = e(); answers.resize(n); bfs(root); return answers; } private: int n, root; vector<vector<edge>> es; vector<int> vis; vector<vector<E>> outs; vector<E> reverse_edge; vector<V> answers; V dfs(int v){ vis[v]++; E val = e(); for (auto &p : es[v]){ if (vis[p.to] > 0 && p.to != es[v].back().to) swap(p,es[v].back()); if (vis[p.to] > 0) continue; E nval = put_edge(dfs(p.to),p.idx); outs[v].emplace_back(nval); val = merge(val,nval); } return put_vertex(val,v); } void bfs(int v){ int siz = outs[v].size(); vector<E> lui(siz+1), rui(siz+1); lui[0] = e(), rui[siz] = e(); for (int i = 0; i < siz; i++) lui[i+1] = merge(lui[i],outs[v][i]); for (int i = siz-1; i >= 0; i--) rui[i] = merge(outs[v][i],rui[i+1]); for (int i = 0; i < siz; i++){ reverse_edge[es[v][i].to] = put_edge(put_vertex(merge(merge(lui[i],rui[i+1]),reverse_edge[v]),v),es[v][i].rev_idx); bfs(es[v][i].to); } answers[v] = put_vertex(merge(lui[siz],reverse_edge[v]), v); } }; // Education dp subtree // https://atcoder.jp/contests/dp/submissions/37662999 using T_monoid = mint; // E using T_DP = mint; // V mint A[202020]; T_monoid merge(T_monoid a, T_monoid b){ return a + b; } T_monoid e(){ return 0; } T_monoid put_edge(T_DP x, int i){ return x; } T_DP put_vertex(T_monoid x, int v){ return (x + 1) * A[v]; } // 参考 // https://trap.jp/post/1702/ // https://null-mn.hatenablog.com/entry/2020/04/14/124151 // fがput_edge, gがput_vertex // 辺の情報が必要なときはedge[i]を作る、また頂点の情報が必要な時はvertex[v]を作る int main(){ cin.tie(0); ios_base::sync_with_stdio(false); int N; cin >> N; rep(i, N) cin >> A[i]; RerootingDP<T_monoid, T_DP, merge, e, put_edge, put_vertex> g(N); rep(i, N - 1){ int U, V; cin >> U >> V; U--; V--; g.add_edge(U, V, i, i); } g.build(0); vector<mint> B = g.reroot(); mint ans = 0; rep(i, N) ans += B[i] - (mint)A[i]; cout << ans / (mint)2 << endl; }