結果
問題 | No.1744 Selfish Spies 1 (à la Princess' Perfectionism) |
ユーザー | opt |
提出日時 | 2021-11-09 14:10:56 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 4,096 bytes |
コンパイル時間 | 5,446 ms |
コンパイル使用メモリ | 294,732 KB |
実行使用メモリ | 17,616 KB |
最終ジャッジ日時 | 2024-11-30 05:01:50 |
合計ジャッジ時間 | 7,136 ms |
ジャッジサーバーID (参考情報) |
judge3 / 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 | 1 ms
5,248 KB |
testcase_02 | AC | 2 ms
5,248 KB |
testcase_03 | AC | 1 ms
5,248 KB |
testcase_04 | AC | 2 ms
5,248 KB |
testcase_05 | AC | 2 ms
5,248 KB |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | AC | 2 ms
5,248 KB |
testcase_09 | AC | 2 ms
5,248 KB |
testcase_10 | AC | 2 ms
5,248 KB |
testcase_11 | AC | 2 ms
5,248 KB |
testcase_12 | WA | - |
testcase_13 | AC | 2 ms
5,248 KB |
testcase_14 | AC | 3 ms
5,248 KB |
testcase_15 | AC | 3 ms
5,248 KB |
testcase_16 | AC | 3 ms
5,248 KB |
testcase_17 | AC | 4 ms
5,248 KB |
testcase_18 | AC | 4 ms
5,248 KB |
testcase_19 | AC | 2 ms
5,248 KB |
testcase_20 | AC | 2 ms
5,248 KB |
testcase_21 | AC | 2 ms
5,248 KB |
testcase_22 | AC | 2 ms
5,248 KB |
testcase_23 | AC | 2 ms
5,248 KB |
testcase_24 | AC | 14 ms
6,016 KB |
testcase_25 | AC | 3 ms
5,248 KB |
testcase_26 | AC | 3 ms
5,248 KB |
testcase_27 | AC | 6 ms
5,248 KB |
testcase_28 | AC | 79 ms
17,304 KB |
testcase_29 | AC | 6 ms
5,248 KB |
testcase_30 | AC | 6 ms
5,248 KB |
testcase_31 | AC | 6 ms
5,248 KB |
testcase_32 | AC | 5 ms
5,248 KB |
testcase_33 | AC | 76 ms
17,616 KB |
testcase_34 | AC | 77 ms
17,476 KB |
testcase_35 | AC | 81 ms
17,344 KB |
testcase_36 | AC | 78 ms
17,324 KB |
testcase_37 | AC | 78 ms
17,144 KB |
testcase_38 | AC | 72 ms
17,316 KB |
ソースコード
#include<bits/stdc++.h> using namespace std; #include<atcoder/all> using namespace atcoder; #define rep_(i, a_, b_, a, b, ...) for (int i = (a), lim##i = (b); i < lim##i; ++i) #define rep(i, ...) rep_(i, __VA_ARGS__, __VA_ARGS__, 0, __VA_ARGS__) // rep(i, a): [0, a); rep(i, a, b): [a, b) struct fast_ios { fast_ios(){ cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(20); }; } fast_ios_; struct dm_decomposition { using edge = pair<int, int>; int r, c; vector<edge> E; dm_decomposition(int _r, int _c) : r(_r), c(_c) {} void add_edge(int i, int j) { E.emplace_back(i, j); } pair<vector<vector<int>>, vector<vector<int>>> decompose() { int n = r + c, m = E.size(); int s = n, t = s + 1; vector<vector<array<int, 3>>> G(n); vector<bool> is_used_V(n); { // max flow atcoder::mf_graph<int> mfg(n + 2); for (auto [i, j] : E) mfg.add_edge(i, r + j, 1); for (int i = 0; i < r; i++) mfg.add_edge(s, i, 1); for (int j = 0; j < c; j++) mfg.add_edge(r + j, t, 1); mfg.flow(s, t); // construct graph for (int k = 0; k < m; k++) { auto e = mfg.get_edge(k); if (e.flow == 1) { G[e.from].push_back({k, e.to, 3}); G[e.to].push_back({k, e.from, 3}); is_used_V[e.from] = is_used_V[e.to] = true; } else { G[e.from].push_back({k, e.to, 1}); G[e.to].push_back({k, e.from, 2}); } } } vector<int> V_0, V_inf; { // check reachability vector<int> R_unused, C_unused; for (int u = 0; u < r; u++) if (!is_used_V[u]) R_unused.push_back(u); for (int u = r; u < n; u++) if (!is_used_V[u]) C_unused.push_back(u); auto bfs = [&] (vector<int>& S, bool fwd) { vector<bool> seen(n); queue<int> que; for (auto u : S) seen[u] = true, que.push(u); while (!que.empty()) { auto u = que.front(); que.pop(); for (auto [id, v, d] : G[u]) { if ((fwd && (d >> 0 & 1)) || (!fwd && (d >> 1 & 1))) { if (seen[v] == false) seen[v] = true, que.push(v); } } } vector<int> res; for (int u = 0; u < n; u++) if (seen[u]) res.push_back(u); return res; }; V_inf = bfs(R_unused, true); V_0 = bfs(C_unused, false); } // erase nodes and edges vector<bool> is_erased_V(n), is_erased_E(m); for (auto u : V_0) { is_erased_V[u] = true; for (auto [id, v, d] : G[u]) is_erased_E[id] = true; } for (auto u : V_inf) { is_erased_V[u] = true; for (auto [id, v, d] : G[u]) is_erased_E[id] = true; } vector<vector<int>> Rs, Cs; auto push_nodes = [&] (vector<int>& V) { Rs.push_back({}), Cs.push_back({}); for (auto u : V) { if (u < r) Rs.back().push_back(u); else Cs.back().push_back(u - r); } }; push_nodes(V_0); // scc decomposition atcoder::scc_graph sccg(n); for (int u = 0; u < n; u++) { for (auto [id, v, d] : G[u]) { if ((d & 1) && !is_erased_E[id]) sccg.add_edge(u, v); } } for (auto vs : sccg.scc()) { if (is_erased_V[vs.front()]) continue; push_nodes(vs); } push_nodes(V_inf); return {Rs, Cs}; } }; void solve() { int n, m, l; cin >> n >> m >> l; assert(1 <= n && n <= 1000); assert(1 <= m && m <= 1000); assert(1 <= l && l <= int(1e5)); dm_decomposition dm(n, m); set<pair<int, int>> S; rep(i, l) { int s, t; cin >> s >> t; assert(1 <= s && s <= n); assert(1 <= t && t <= m); S.emplace(s, t); --s, --t; dm.add_edge(s, t); } assert(S.size() == l); auto [rs, cs] = dm.decompose(); vector<int> cid_R(n), cid_C(m); int cnum = rs.size(); rep(k, cnum) for (auto i : rs[k]) cid_R[i] = k; rep(k, cnum) for (auto i : cs[k]) cid_C[i] = k; for (auto [i, j] : dm.E) { bool ans = true; if (cid_R[i] == cid_C[j] && rs[cid_R[i]].size() == 1) ans = false; cout << (ans ? "Yes" : "No") << '\n'; } } int main() { solve(); }