結果
問題 | No.2301 Namorientation |
ユーザー | Daylight |
提出日時 | 2023-05-12 22:24:56 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 5,120 bytes |
コンパイル時間 | 2,688 ms |
コンパイル使用メモリ | 229,152 KB |
実行使用メモリ | 93,696 KB |
最終ジャッジ日時 | 2024-05-06 12:28:21 |
合計ジャッジ時間 | 21,894 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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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 | WA | - |
testcase_03 | WA | - |
testcase_04 | WA | - |
testcase_05 | WA | - |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | AC | 2 ms
5,376 KB |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 2 ms
5,376 KB |
testcase_11 | AC | 1 ms
5,376 KB |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | WA | - |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | WA | - |
testcase_21 | WA | - |
testcase_22 | AC | 522 ms
93,696 KB |
testcase_23 | AC | 473 ms
92,340 KB |
testcase_24 | AC | 390 ms
77,696 KB |
testcase_25 | AC | 343 ms
34,400 KB |
testcase_26 | AC | 446 ms
43,412 KB |
testcase_27 | WA | - |
testcase_28 | WA | - |
testcase_29 | WA | - |
testcase_30 | WA | - |
testcase_31 | WA | - |
ソースコード
#include <bits/stdc++.h> using namespace std; #define SZ(x) (int) (x).size() #define REP(i, n) for(int i = 0; i < (n); i++) #define FOR(i, a, b) for(auto i = (a); i < (b); i++) #define For(i, a, b, c) \ for(auto i = (a); i != (b); i += (c)) #define REPR(i, n) for(auto i = (n) -1; i >= 0; i--) #define ALL(s) (s).begin(), (s).end() #define so(V) sort(ALL(V)) #define rev(V) reverse(ALL(V)) #define uni(v) v.erase(unique(ALL(v)), (v).end()) #define eb emplace_back typedef unsigned long long ull; typedef long long ll; typedef vector<int> vi; typedef vector<ll> vll; typedef vector<bool> vb; typedef vector<vi> vvi; typedef vector<vll> vvll; typedef pair<int, int> PI; typedef pair<ll, ll> PL; const double EPS = 1e-6; const int MOD = 1e9 + 7; const int INF = (1 << 30); const ll LINF = 1e18; const double math_PI = acos(-1); template<typename T> vector<T> make_v(size_t a) { return vector<T>(a); } template<typename T, typename... Ts> auto make_v(size_t a, Ts... ts) { return vector<decltype(make_v<T>(ts...))>( a, make_v<T>(ts...)); } template<typename T, typename V> typename enable_if<is_class<T>::value == 0>::type fill_v( T& t, const V& v) { t = v; } template<typename T, typename V> typename enable_if<is_class<T>::value != 0>::type fill_v( T& t, const V& v) { for(auto& e: t) fill_v(e, v); } template<class T> bool chmax(T& a, const T& b) { if(a < b) { a = b; return true; } return false; } template<class T> bool chmin(T& a, const T& b) { if(a > b) { a = b; return true; } return false; } template<typename S, typename T> istream& operator>>(istream& is, pair<S, T>& p) { cin >> p.first >> p.second; return is; } template<typename T> istream& operator>>(istream& is, vector<T>& vec) { for(T& x: vec) is >> x; return is; } template<typename T> string join(vector<T>& vec, string splitter) { stringstream ss; REP(i, SZ(vec)) { if(i != 0) ss << splitter; ss << vec[i]; } return ss.str(); } template<typename T> ostream& operator<<(ostream& os, vector<T>& vec) { os << join(vec, " "); return os; } template<class T = ll> struct Edge { public: int from, to; T cost; Edge() { } Edge(int _from, int _to, T _cost) { from = _from; to = _to; cost = _cost; } }; template<class T = ll> using Edges = vector<Edge<T>>; template<class T = ll> using Graph = vector<Edges<T>>; vi cycle_detection(Graph<>& G) { int N = SZ(G); vi cycle; vb visited(N); vb seen(N); auto dfs = [&](auto f, int cur, int pre = -1) -> int { if(seen[cur]) { return cur; } seen[cur] = true; for(Edge e: G[cur]) { if(e.to == pre) continue; if(visited[e.to]) continue; int begin = f(f, e.to, cur); if(begin == -2) { visited[cur] = true; return -2; } if(begin == -1) continue; if(begin == cur) { cycle.push_back(cur); visited[cur] = true; return -2; } cycle.push_back(cur); visited[cur] = true; return begin; } visited[cur] = true; return -1; }; REP(i, N) { if(!cycle.empty()) break; if(visited[i]) continue; dfs(dfs, i); } if(cycle.empty()) { return vi(); } rev(cycle); vi C(N, -1); REP(i, SZ(cycle)) { C[cycle[i]] = i; } int ind = 0; vi ret; using P = pair<int, int>; set<P> S; while(ind != -1) { int v = cycle[ind]; ret.push_back(v); S.insert({ ind, SZ(ret) - 1 }); int next = -1; int pre = -1; for(Edge e: G[v]) { int n = C[e.to]; if(n == -1) continue; if(n < ind) { auto [a, b] = *S.lower_bound({ n, 0 }); if(a != n) continue; chmax(pre, b); } chmax(next, n); } if(pre != -1) { vi new_ret; FOR(i, pre, SZ(ret)) { new_ret.push_back(ret[i]); } ret = new_ret; return ret; } ind = next; } return ret; } int main() { cin.tie(nullptr); ios::sync_with_stdio(false); int N; cin >> N; Graph<> G(N); map<PI, int> M; REP(i, N) { int A, B; cin >> A >> B; A--; B--; G[A].eb(A, B, i + 1); G[B].eb(B, A, -i - 1); M[{ A, B }] = i + 1; M[{ B, A }] = -1 - i; } vi to(N, -1); vi ans(N, -1); auto dfs2 = [&](auto f, int cur, int pre) -> void { for(auto e: G[cur]) { if(e.to == pre) continue; int m = M[{ pre, cur }]; if(m > 0) ans[m - 1] = 0; else ans[-m - 1] = 1; f(f, e.to, cur); } }; bool found = false; auto dfs = [&](auto f, int cur, int pre) -> void { if(found) return; if(to[cur] != -1) { int c = to[cur]; int p = cur; int m = M[{ cur, to[cur] }]; if(m > 0) ans[m - 1] = 1; else ans[-m - 1] = 0; for(auto e: G[c]) { if(e.to != to[c] && e.to != p) { dfs2(dfs2, e.to, c); } } p = c; c = to[c]; while(c != to[cur]) { m = M[{ p, c }]; if(m > 0) ans[m - 1] = 1; else ans[-m - 1] = 0; for(auto e: G[c]) { if(e.to != to[c] && e.to != p) { dfs2(dfs2, e.to, c); } } p = c; c = to[c]; } found = true; return; } for(auto e: G[cur]) { if(e.to == pre) continue; to[e.from] = e.to; f(f, e.to, e.from); to[e.from] = -1; } }; dfs(dfs, 0, -1); REP(i, N) { if(ans[i] == 1) { cout << "->" << endl; } else { cout << "<-" << endl; } } return 0; }