結果
問題 | No.2301 Namorientation |
ユーザー | rniya |
提出日時 | 2023-05-12 21:38:42 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 132 ms / 3,000 ms |
コード長 | 4,102 bytes |
コンパイル時間 | 2,539 ms |
コンパイル使用メモリ | 216,088 KB |
実行使用メモリ | 50,504 KB |
最終ジャッジ日時 | 2024-05-06 11:21:48 |
合計ジャッジ時間 | 11,044 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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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 | 2 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 2 ms
5,376 KB |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 1 ms
5,376 KB |
testcase_11 | AC | 2 ms
5,376 KB |
testcase_12 | AC | 67 ms
12,416 KB |
testcase_13 | AC | 59 ms
11,520 KB |
testcase_14 | AC | 118 ms
18,432 KB |
testcase_15 | AC | 69 ms
13,312 KB |
testcase_16 | AC | 110 ms
16,256 KB |
testcase_17 | AC | 66 ms
12,672 KB |
testcase_18 | AC | 102 ms
16,512 KB |
testcase_19 | AC | 54 ms
11,008 KB |
testcase_20 | AC | 101 ms
16,512 KB |
testcase_21 | AC | 70 ms
13,184 KB |
testcase_22 | AC | 96 ms
50,504 KB |
testcase_23 | AC | 96 ms
49,628 KB |
testcase_24 | AC | 77 ms
42,048 KB |
testcase_25 | AC | 49 ms
15,060 KB |
testcase_26 | AC | 60 ms
18,848 KB |
testcase_27 | AC | 119 ms
18,432 KB |
testcase_28 | AC | 126 ms
18,304 KB |
testcase_29 | AC | 129 ms
18,432 KB |
testcase_30 | AC | 132 ms
18,560 KB |
testcase_31 | AC | 121 ms
18,432 KB |
ソースコード
#include <bits/stdc++.h> #ifdef LOCAL #include <debug.hpp> #else #define debug(...) void(0) #endif template <bool directed> struct CycleDetection { std::vector<std::vector<int>> G; int n, pos; CycleDetection(int n) : G(n), n(n), pos(-1), seen(n, 0), finished(n, 0) {} void add_edge(int u, int v) { G[u].emplace_back(v); if (!directed) G[v].emplace_back(u); } std::vector<int> build() { for (int v = 0; v < n; v++) { if (!seen[v]) dfs(v, -1); if (~pos) break; } std::vector<int> res; while (!hist.empty()) { int t = hist.top(); hist.pop(); res.emplace_back(t); if (t == pos) break; } return res; } private: std::vector<int> seen, finished; std::stack<int> hist; void dfs(int v, int p) { seen[v] = 1; hist.emplace(v); for (int u : G[v]) { if (!directed and u == p) continue; if (finished[u]) continue; if (seen[u] and !finished[u]) { pos = u; return; } dfs(u, v); if (~pos) return; } finished[v] = 1; hist.pop(); } }; using namespace std; typedef long long ll; #define all(x) begin(x), end(x) constexpr int INF = (1 << 30) - 1; constexpr long long IINF = (1LL << 60) - 1; constexpr int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1}; template <class T> istream& operator>>(istream& is, vector<T>& v) { for (auto& x : v) is >> x; return is; } template <class T> ostream& operator<<(ostream& os, const vector<T>& v) { auto sep = ""; for (const auto& x : v) os << exchange(sep, " ") << x; return os; } template <class T, class U = T> bool chmin(T& x, U&& y) { return y < x and (x = forward<U>(y), true); } template <class T, class U = T> bool chmax(T& x, U&& y) { return x < y and (x = forward<U>(y), true); } template <class T> void mkuni(vector<T>& v) { sort(begin(v), end(v)); v.erase(unique(begin(v), end(v)), end(v)); } template <class T> int lwb(const vector<T>& v, const T& x) { return lower_bound(begin(v), end(v), x) - begin(v); } int main() { ios::sync_with_stdio(false); cin.tie(nullptr); int N; cin >> N; vector<vector<pair<int, int>>> G(N); vector<int> A(N), B(N); for (int i = 0; i < N; i++) { cin >> A[i] >> B[i]; A[i]--, B[i]--; G[A[i]].emplace_back(B[i], i); G[B[i]].emplace_back(A[i], i); } vector<int> c, contained(N, false); { vector<bool> seen(N, false), finished(N, false); stack<int> hist; int pos = -1; auto dfs = [&](auto self, int v, int p) -> void { seen[v] = 1; hist.emplace(v); for (auto [u, idx] : G[v]) { if (u == p) continue; if (finished[u]) continue; if (seen[u] and !finished[u]) { pos = u; return; } self(self, u, v); if (~pos) return; } finished[v] = 1; hist.pop(); }; dfs(dfs, 0, -1); while (!hist.empty()) { int t = hist.top(); hist.pop(); c.emplace_back(t); contained[t] = true; if (t == pos) break; } } int len = c.size(); vector<int> ans(N, -1); for (int i = 0; i < len; i++) { int u = c[i], v = c[(i + 1) % len]; for (auto [w, idx] : G[u]) { if (w == v) { ans[idx] = (A[idx] == u); } } } { auto dfs = [&](auto self, int v) -> void { contained[v] = true; for (auto [u, idx] : G[v]) { if (contained[u]) continue; ans[idx] = (A[idx] == v); self(self, u); } }; for (int& u : c) dfs(dfs, u); } for (int i = 0; i < N; i++) cout << (ans[i] == 0 ? "->" : "<-") << '\n'; return 0; }