結果
問題 | No.2536 同値性と充足可能性 |
ユーザー | iiljj |
提出日時 | 2023-11-10 22:12:25 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 74 ms / 2,000 ms |
コード長 | 14,952 bytes |
コンパイル時間 | 2,172 ms |
コンパイル使用メモリ | 166,376 KB |
実行使用メモリ | 16,168 KB |
最終ジャッジ日時 | 2024-09-26 01:41:22 |
合計ジャッジ時間 | 3,876 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 | 1 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 | 2 ms
5,376 KB |
testcase_11 | AC | 2 ms
5,376 KB |
testcase_12 | AC | 2 ms
5,376 KB |
testcase_13 | AC | 1 ms
5,376 KB |
testcase_14 | AC | 2 ms
5,376 KB |
testcase_15 | AC | 1 ms
5,376 KB |
testcase_16 | AC | 2 ms
5,376 KB |
testcase_17 | AC | 2 ms
5,376 KB |
testcase_18 | AC | 2 ms
5,376 KB |
testcase_19 | AC | 2 ms
5,376 KB |
testcase_20 | AC | 4 ms
5,376 KB |
testcase_21 | AC | 4 ms
5,376 KB |
testcase_22 | AC | 4 ms
5,376 KB |
testcase_23 | AC | 26 ms
8,832 KB |
testcase_24 | AC | 27 ms
8,960 KB |
testcase_25 | AC | 62 ms
14,668 KB |
testcase_26 | AC | 67 ms
15,080 KB |
testcase_27 | AC | 45 ms
12,844 KB |
testcase_28 | AC | 74 ms
16,168 KB |
testcase_29 | AC | 55 ms
14,436 KB |
testcase_30 | AC | 43 ms
13,252 KB |
ソースコード
/* #region Head */ // #include <bits/stdc++.h> #include <algorithm> #include <array> #include <bitset> #include <cassert> // assert.h #include <cmath> // math.h #include <cstring> #include <ctime> #include <deque> #include <fstream> #include <functional> #include <iomanip> #include <iostream> #include <list> #include <map> #include <memory> #include <numeric> #include <queue> #include <random> #include <set> #include <sstream> #include <stack> #include <string> #include <unordered_map> #include <unordered_set> #include <vector> using namespace std; using ll = long long; using ull = unsigned long long; using ld = long double; using pll = pair<ll, ll>; template <class T> using vc = vector<T>; template <class T> using vvc = vc<vc<T>>; using vll = vc<ll>; using vvll = vvc<ll>; using vld = vc<ld>; using vvld = vvc<ld>; using vs = vc<string>; using vvs = vvc<string>; template <class T, class U> using um = unordered_map<T, U>; template <class T> using pq = priority_queue<T>; template <class T> using pqa = priority_queue<T, vc<T>, greater<T>>; template <class T> using us = unordered_set<T>; #define TREP(T, i, m, n) for (T i = (m), i##_len = (T)(n); i < i##_len; ++(i)) #define TREPM(T, i, m, n) for (T i = (m), i##_max = (T)(n); i <= i##_max; ++(i)) #define TREPR(T, i, m, n) for (T i = (m), i##_min = (T)(n); i >= i##_min; --(i)) #define TREPD(T, i, m, n, d) for (T i = (m), i##_len = (T)(n); i < i##_len; i += (d)) #define TREPMD(T, i, m, n, d) for (T i = (m), i##_max = (T)(n); i <= i##_max; i += (d)) #define REP(i, m, n) for (ll i = (m), i##_len = (ll)(n); i < i##_len; ++(i)) #define REPM(i, m, n) for (ll i = (m), i##_max = (ll)(n); i <= i##_max; ++(i)) #define REPR(i, m, n) for (ll i = (m), i##_min = (ll)(n); i >= i##_min; --(i)) #define REPD(i, m, n, d) for (ll i = (m), i##_len = (ll)(n); i < i##_len; i += (d)) #define REPMD(i, m, n, d) for (ll i = (m), i##_max = (ll)(n); i <= i##_max; i += (d)) #define REPI(itr, ds) for (auto itr = ds.begin(); itr != ds.end(); itr++) #define REPIR(itr, ds) for (auto itr = ds.rbegin(); itr != ds.rend(); itr++) #define ALL(x) begin(x), end(x) #define SIZE(x) ((ll)(x).size()) #define ISIZE(x) ((int)(x).size()) #define PERM(c) \ sort(ALL(c)); \ for (bool c##p = 1; c##p; c##p = next_permutation(ALL(c))) #define UNIQ(v) v.erase(unique(ALL(v)), v.end()); #define CEIL(a, b) (((a) + (b)-1) / (b)) #define endl '\n' constexpr ll INF = 1'010'000'000'000'000'017LL; constexpr int IINF = 1'000'000'007LL; constexpr ll MOD = 1'000'000'007LL; // 1e9 + 7 // constexpr ll MOD = 998244353; constexpr ld EPS = 1e-12; constexpr ld PI = 3.14159265358979323846; template <typename T> istream &operator>>(istream &is, vc<T> &vec) { // vector 入力 for (T &x : vec) is >> x; return is; } template <typename T> ostream &operator<<(ostream &os, const vc<T> &vec) { // vector 出力 (for dump) os << "{"; REP(i, 0, SIZE(vec)) os << vec[i] << (i == i_len - 1 ? "" : ", "); os << "}"; return os; } template <typename T> ostream &operator>>(ostream &os, const vc<T> &vec) { // vector 出力 (inline) REP(i, 0, SIZE(vec)) os << vec[i] << (i == i_len - 1 ? "\n" : " "); return os; } template <typename T, size_t _Nm> istream &operator>>(istream &is, array<T, _Nm> &arr) { // array 入力 REP(i, 0, SIZE(arr)) is >> arr[i]; return is; } template <typename T, size_t _Nm> ostream &operator<<(ostream &os, const array<T, _Nm> &arr) { // array 出力 (for dump) os << "{"; REP(i, 0, SIZE(arr)) os << arr[i] << (i == i_len - 1 ? "" : ", "); os << "}"; return os; } template <typename T, typename U> istream &operator>>(istream &is, pair<T, U> &pair_var) { // pair 入力 is >> pair_var.first >> pair_var.second; return is; } template <typename T, typename U> ostream &operator<<(ostream &os, const pair<T, U> &pair_var) { // pair 出力 os << "(" << pair_var.first << ", " << pair_var.second << ")"; return os; } // map, um, set, us 出力 template <class T> ostream &out_iter(ostream &os, const T &map_var) { os << "{"; REPI(itr, map_var) { os << *itr; auto itrcp = itr; if (++itrcp != map_var.end()) os << ", "; } return os << "}"; } template <typename T, typename U> ostream &operator<<(ostream &os, const map<T, U> &map_var) { return out_iter(os, map_var); } template <typename T, typename U> ostream &operator<<(ostream &os, const um<T, U> &map_var) { os << "{"; REPI(itr, map_var) { auto [key, value] = *itr; os << "(" << key << ", " << value << ")"; auto itrcp = itr; if (++itrcp != map_var.end()) os << ", "; } os << "}"; return os; } template <typename T> ostream &operator<<(ostream &os, const set<T> &set_var) { return out_iter(os, set_var); } template <typename T> ostream &operator<<(ostream &os, const us<T> &set_var) { return out_iter(os, set_var); } template <typename T> ostream &operator<<(ostream &os, const pq<T> &pq_var) { pq<T> pq_cp(pq_var); os << "{"; if (!pq_cp.empty()) { os << pq_cp.top(), pq_cp.pop(); while (!pq_cp.empty()) os << ", " << pq_cp.top(), pq_cp.pop(); } return os << "}"; } // tuple 出力 template <size_t N = 0, bool end_line = false, typename... Args> ostream &operator<<(ostream &os, tuple<Args...> &a) { if constexpr (N < std::tuple_size_v<tuple<Args...>>) { os << get<N>(a); if constexpr (N + 1 < std::tuple_size_v<tuple<Args...>>) { os << ' '; } else if constexpr (end_line) { os << '\n'; } return operator<< <N + 1, end_line>(os, a); } return os; } template <typename... Args> void print_tuple(tuple<Args...> &a) { operator<< <0, true>(std::cout, a); } void pprint() { std::cout << endl; } template <class Head, class... Tail> void pprint(Head &&head, Tail &&...tail) { std::cout << head; if (sizeof...(Tail) > 0) std::cout << ' '; pprint(move(tail)...); } // dump #define DUMPOUT cerr void dump_func() { DUMPOUT << endl; } template <class Head, class... Tail> void dump_func(Head &&head, Tail &&...tail) { DUMPOUT << head; if (sizeof...(Tail) > 0) DUMPOUT << ", "; dump_func(move(tail)...); } // chmax (更新「される」かもしれない値が前) template <typename T, typename U, typename Comp = less<>> bool chmax(T &xmax, const U &x, Comp comp = {}) { if (comp(xmax, x)) { xmax = x; return true; } return false; } // chmin (更新「される」かもしれない値が前) template <typename T, typename U, typename Comp = less<>> bool chmin(T &xmin, const U &x, Comp comp = {}) { if (comp(x, xmin)) { xmin = x; return true; } return false; } // ローカル用 #ifndef ONLINE_JUDGE #define DEBUG_ #endif #ifndef MYLOCAL #undef DEBUG_ #endif #ifdef DEBUG_ #define DEB #define dump(...) \ DUMPOUT << " " << string(#__VA_ARGS__) << ": " \ << "[" << to_string(__LINE__) << ":" << __FUNCTION__ << "]" << endl \ << " ", \ dump_func(__VA_ARGS__) #else #define DEB if (false) #define dump(...) #endif #define VAR(type, ...) \ type __VA_ARGS__; \ assert((std::cin >> __VA_ARGS__)); template <typename T> istream &operator,(istream &is, T &rhs) { return is >> rhs; } template <typename T> ostream &operator,(ostream &os, const T &rhs) { return os << ' ' << rhs; } struct AtCoderInitialize { static constexpr int IOS_PREC = 15; static constexpr bool AUTOFLUSH = false; AtCoderInitialize() { ios_base::sync_with_stdio(false), std::cin.tie(nullptr), std::cout.tie(nullptr); std::cout << fixed << setprecision(IOS_PREC); if (AUTOFLUSH) std::cout << unitbuf; } } ATCODER_INITIALIZE; void Yn(bool p) { std::cout << (p ? "Yes" : "No") << endl; } void YN(bool p) { std::cout << (p ? "YES" : "NO") << endl; } template <typename T> constexpr void operator--(vc<T> &v, int) noexcept { for (int i = 0; i < ISIZE(v); ++i) v[i]--; } template <typename T> constexpr void operator++(vc<T> &v, int) noexcept { for (int i = 0; i < ISIZE(v); ++i) v[i]++; } /* #endregion */ // #include <atcoder/all> // using namespace atcoder; /* #region UnionFind */ struct UnionFind { int _groupcount; // グループ数 vc<int> parent; // 各要素の直接の親リスト,親がいないときは自分自身を指す vc<int> gsize; // 各要素が根である場合,その要素が属するグループの要素数 (root 要素のみ有効な値を持つ) // コンストラクタ UnionFind() {} // コンストラクタ,要素数 n の UnionFind 木を構築する UnionFind(const int n) : _groupcount(n), parent(n), gsize(n, 1) { iota(ALL(parent), 0LL); } // x の属する部分木の根要素を返す int find(const int x) { return x == parent[x] ? x : parent[x] = find(parent[x]); } // x と y が同じグループかどうか判定する bool same(const int x, const int y) { return find(x) == find(y); } // x と y を同じグループにする void unite(const int x, const int y) { ll rx = find(x); // x の属するグループの根 ll ry = find(y); // y の属するグループの根 if (rx == ry) // unite 済 return; // assert(x != y) if (gsize[rx] < gsize[ry]) swap(rx, ry); // assert(gsize[x] > gsize[y]); // x 側の木の方が大きい gsize[rx] += gsize[ry]; // x を根とする1つのグループに統合 parent[ry] = rx; // ry 以下の木を rx 配下に接続する _groupcount--; } // x が属するグループの要素数を返す int size(const int x) { return gsize[find(x)]; } // 全体のグループ数を返す int count() const { return _groupcount; } }; /* #endregion */ /* #region Graph */ // エッジ(本来エッジは双方向だが,ここでは単方向で管理) template <class weight_t = int, class flow_t = int> struct Edge { int src; // エッジ始点となる頂点 int dst; // エッジ終点となる頂点 weight_t weight; // 重み flow_t cap; Edge() : src(0), dst(0), weight(0) {} Edge(int src, int dst, weight_t weight) : src(src), dst(dst), weight(weight) {} Edge(int src, int dst, weight_t weight, flow_t cap) : src(src), dst(dst), weight(weight), cap(cap) {} // Edge 標準出力 friend ostream &operator<<(ostream &os, Edge &edge) { os << "(" << edge.src << " -> " << edge.dst << ", " << edge.weight << ")"; return os; } }; // 同じ頂点を始点とするエッジ集合 template <class weight_t = int, class flow_t = int> class Node : public vc<Edge<weight_t, flow_t>> { public: int idx; Node() : vc<Edge<weight_t, flow_t>>() {} // void add(int a, int b, weight_t w, flow_t cap) { this->emplace_back(a, b, w, cap); }; }; // graph[i] := 頂点 i を始点とするエッジ集合 template <class weight_t = int, class flow_t = int> class Graph : public vc<Node<weight_t, flow_t>> { public: Graph() : vc<Node<weight_t, flow_t>>() {} Graph(int n) : vc<Node<weight_t, flow_t>>(n) { REP(i, 0, n)(*this)[i].idx = i; } /** 単方向 */ void add_arc(int a, int b, weight_t w = 1, flow_t cap = 1) { (*this)[a].emplace_back(a, b, w, cap); } /** 双方向 */ void add_edge(int a, int b, weight_t w = 1, flow_t cap = 1) { add_arc(a, b, w, cap), add_arc(b, a, w, cap); } /** ノード追加 */ int add_node() { int idx = (int)this->size(); this->emplace_back(); Node<weight_t, flow_t> &node = this->back(); node.idx = idx; return idx; } }; // using Array = vc<Weight>; // using Matrix = vc<Array>; /* #endregion */ template <class weight_t, class flow_t> bool is_bipartite_dfs(Graph<weight_t, flow_t> &g, vll &groupnums, ll num, ll idx) { if (groupnums[idx] == num) return true; // 既に塗ってある else if (groupnums[idx] == -1) groupnums[idx] = num; // 新たに塗る else return false; // 違う色で塗ってある num = (num + 1) % 2; for (Edge<weight_t, flow_t> edge : g[idx]) if (!is_bipartite_dfs(g, groupnums, num, edge.dst)) return false; return true; } template <class weight_t, class flow_t> bool is_bipartite(Graph<weight_t, flow_t> &g, ll n, vll &groupnums) { // vll groupnums(n, -1); REP(i, 0, n) { if (groupnums[i] != -1) continue; // 訪問済み if (!is_bipartite_dfs(g, groupnums, 0, i)) return false; } return true; } // Problem void solve() { VAR(ll, n, m); vll I(m), J(m); vs E_str(m); REP(i, 0, m) cin >> I[i], E_str[i], J[i]; I--, J--; vll E(m); REP(i, 0, m) E[i] = (E_str[i] == "<==>"); // 同値をグループ化して二部グラフ判定する. UnionFind uf(n); REP(i, 0, m) if (E[i] == 1) { uf.unite(I[i], J[i]); // } vll roots(n); REP(i, 0, n) roots[i] = uf.find(i); sort(ALL(roots)); UNIQ(roots); const ll sz = uf.count(); assert(sz == SIZE(roots)); Graph<> graph(sz); set<pll> st; REP(i, 0, m) { if (E[i] == 1) continue; const ll root0 = uf.find(I[i]); const ll root1 = uf.find(J[i]); if (root0 == root1) { Yn(false); return; } ll idx0 = lower_bound(ALL(roots), root0) - roots.begin(); ll idx1 = lower_bound(ALL(roots), root1) - roots.begin(); if (idx0 > idx1) swap(idx0, idx1); pll key = {idx0, idx1}; if (st.count(key)) continue; graph.add_edge(idx0, idx1); st.insert(key); } vll groupnums(sz, -1); const bool result = is_bipartite(graph, sz, groupnums); if (not result) { Yn(false); return; } vvll nodes(2, vll(0)); REP(i, 0, n) { const ll root0 = uf.find(i); const ll idx0 = lower_bound(ALL(roots), root0) - roots.begin(); nodes[groupnums[idx0]].push_back(i + 1); } if (SIZE(nodes[0]) < SIZE(nodes[1])) { swap(nodes[0], nodes[1]); } Yn(true); pprint(SIZE(nodes[0])); cout >> nodes[0]; } // entry point int main() { solve(); return 0; }