結果
問題 | No.1817 Reversed Edges |
ユーザー | Forested |
提出日時 | 2022-01-21 22:08:40 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 68 ms / 2,000 ms |
コード長 | 5,932 bytes |
コンパイル時間 | 1,407 ms |
コンパイル使用メモリ | 137,604 KB |
実行使用メモリ | 23,936 KB |
最終ジャッジ日時 | 2024-05-04 13:07:43 |
合計ジャッジ時間 | 3,718 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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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
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 1 ms
5,376 KB |
testcase_03 | AC | 1 ms
5,376 KB |
testcase_04 | AC | 1 ms
5,376 KB |
testcase_05 | AC | 1 ms
5,376 KB |
testcase_06 | AC | 1 ms
5,376 KB |
testcase_07 | AC | 56 ms
13,808 KB |
testcase_08 | AC | 25 ms
8,192 KB |
testcase_09 | AC | 51 ms
13,184 KB |
testcase_10 | AC | 30 ms
8,960 KB |
testcase_11 | AC | 38 ms
10,624 KB |
testcase_12 | AC | 66 ms
14,976 KB |
testcase_13 | AC | 65 ms
14,976 KB |
testcase_14 | AC | 62 ms
14,976 KB |
testcase_15 | AC | 64 ms
15,232 KB |
testcase_16 | AC | 63 ms
15,104 KB |
testcase_17 | AC | 66 ms
15,104 KB |
testcase_18 | AC | 62 ms
14,976 KB |
testcase_19 | AC | 65 ms
15,104 KB |
testcase_20 | AC | 68 ms
15,104 KB |
testcase_21 | AC | 68 ms
15,104 KB |
testcase_22 | AC | 40 ms
17,248 KB |
testcase_23 | AC | 40 ms
16,256 KB |
testcase_24 | AC | 51 ms
23,936 KB |
ソースコード
// ===== template.hpp ===== #include <algorithm> #include <array> #include <bitset> #include <cassert> #include <cmath> #include <iomanip> #include <iostream> #include <map> #include <numeric> #include <queue> #include <set> #include <stack> #include <string> #include <tuple> #include <unordered_map> #include <unordered_set> #include <utility> #include <vector> #define OVERRIDE(a, b, c, d, ...) d #define REP2(i, n) for (i32 i = 0; i < (n); ++i) #define REP3(i, m, n) for (i32 i = (m); i < (n); ++i) #define REP(...) OVERRIDE(__VA_ARGS__, REP3, REP2)(__VA_ARGS__) #define PER(i, n) for (i32 i = (n) - 1; i >= 0; --i) #define ALL(x) begin(x), end(x) using namespace std; using u32 = unsigned int; using u64 = unsigned long long; using u128 = __uint128_t; using i32 = signed int; using i64 = signed long long; using i128 = __int128_t; template <typename T> using Vec = vector<T>; template <typename T> bool chmin(T &x, const T &y) { if (x > y) { x = y; return true; } return false; } template <typename T> bool chmax(T &x, const T &y) { if (x < y) { x = y; return true; } return false; } [[maybe_unused]] constexpr i32 inf = 1000000100; [[maybe_unused]] constexpr i64 inf64 = 3000000000000000100; struct SetIO { SetIO() { ios::sync_with_stdio(false); cin.tie(nullptr); cout << fixed << setprecision(10); } } set_io; // ===== template.hpp ===== #ifdef DEBUGF #include "../new_library/other/debug.hpp" #else #define DBG(x) (void) 0 #endif // ===== rerooting.hpp ===== #ifndef REROOTING_HPP #define REROOTING_HPP #include <optional> #include <queue> #include <utility> #include <vector> template <typename G, typename T, typename Apply, typename Merge> T rerooting_sub1( const G &g, const T &id, const Apply &ap, const Merge &me, std::size_t v, std::size_t p, std::vector<std::vector<std::optional<T>>> &dp) { T acc = id; for (std::size_t i = 0; i < g[v].size(); ++i) { if ((std::size_t)g[v][i] != p) { T val = rerooting_sub1(g, id, ap, me, (std::size_t)g[v][i], v, dp); dp[v][i] = ap(val, v, g[v][i]); acc = me(acc, *dp[v][i]); } } return acc; } template <typename G, typename T, typename Apply, typename Merge> void rerooting_sub2( const G &g, const T &id, const Apply &ap, const Merge &me, std::size_t root, std::vector<std::vector<std::optional<T>>> &dp) { std::queue<std::pair<std::size_t, T>> que; que.emplace(root, id); while (!que.empty()) { auto [v, val] = que.front(); que.pop(); std::vector<T> acc_l(g[v].size() + 1); acc_l[0] = id; std::size_t emp_idx = -1; for (std::size_t i = 0; i < g[v].size(); ++i) { if (!(bool)dp[v][i]) { dp[v][i] = ap(val, v, g[v][i]); emp_idx = i; } acc_l[i + 1] = me(acc_l[i], *dp[v][i]); } T acc_r = id; for (std::size_t i = g[v].size() - 1; i < g[v].size(); --i) { if (i != emp_idx) { que.emplace((std::size_t)g[v][i], me(acc_l[i], acc_r)); } acc_r = me(*dp[v][i], acc_r); } } } // Apply: Fn(T, size_t, E) -> T // Merge: Fn(T, T) -> T template <typename G, typename T, typename Apply, typename Merge> std::vector<T> rerooting(const G &g, const T &id, const Apply &ap, const Merge &me) { std::vector<std::vector<std::optional<T>>> dp(g.size()); for (std::size_t i = 0; i < g.size(); ++i) { dp[i].resize(g[i].size(), std::nullopt); } rerooting_sub1(g, id, ap, me, 0, 0, dp); rerooting_sub2(g, id, ap, me, 0, dp); std::vector<T> buf(g.size(), id); for (std::size_t i = 0; i < g.size(); ++i) { for (std::optional<T> &val : dp[i]) { buf[i] = me(buf[i], std::move(*val)); } } return buf; } #endif // ===== rerooting.hpp ===== // ===== graph.hpp ===== #ifndef GRAPH_HPP #define GRAPH_HPP #include <utility> #include <vector> template <typename Edge> class Graph { std::vector<std::vector<Edge>> edges; public: Graph() : edges() {} Graph(std::size_t v) : edges(v) {} template <typename... T> void add_edge(std::size_t from, std::size_t to, T &&...val) { edges[from].emplace_back(Edge(to, std::forward<T>(val)...)); } template <typename... T> void add_undirected_edge(std::size_t u, std::size_t v, const T &...val) { edges[u].emplace_back(Edge(v, val...)); edges[v].emplace_back(Edge(u, val...)); } std::size_t size() const { return edges.size(); } const std::vector<Edge> &operator[](std::size_t v) const { return edges[v]; } std::vector<Edge> &operator[](std::size_t v) { return edges[v]; } }; struct UnweightedEdge { std::size_t to; UnweightedEdge(std::size_t t) : to(t) {} operator std::size_t() const { return to; } using Weight = std::size_t; Weight wt() const { return 1; } }; template <typename T> struct WeightedEdge { std::size_t to; T wt; WeightedEdge(std::size_t t, const T &w) : to(t), wt(w) {} operator std::size_t() const { return to; } using Weight = T; Weight weight() const { return wt; } }; #endif // ===== graph.hpp ===== int main() { i32 n; cin >> n; Graph<i32> g(n); REP(i, n - 1) { i32 a, b; cin >> a >> b; --a; --b; g.add_undirected_edge(a, b); } const auto ap = [](i32 s, i32 v, i32 e) -> i32 { if (e < v) { return s + 1; } else { return s; } }; const auto me = [](i32 s1, i32 s2) -> i32 { return s1 + s2; }; Vec<i32> dp = rerooting(g, 0, ap, me); REP(i, n) { cout << dp[i] << '\n'; } }