結果

問題 No.1370 置換門松列
ユーザー iiljjiiljj
提出日時 2021-01-29 23:12:38
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 40 ms / 2,000 ms
コード長 16,611 bytes
コンパイル時間 2,438 ms
コンパイル使用メモリ 220,948 KB
実行使用メモリ 14,232 KB
最終ジャッジ日時 2024-09-14 19:22:49
合計ジャッジ時間 4,037 ms
ジャッジサーバーID
（参考情報） 		judge4 / judge1
このコードへのチャレンジ
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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
6,816 KB
testcase_01 AC 2 ms
6,944 KB
testcase_02 AC 2 ms
6,940 KB
testcase_03 AC 2 ms
6,944 KB
testcase_04 AC 2 ms
6,944 KB
testcase_05 AC 2 ms
6,940 KB
testcase_06 AC 2 ms
6,940 KB
testcase_07 AC 2 ms
6,940 KB
testcase_08 AC 2 ms
6,940 KB
testcase_09 AC 2 ms
6,944 KB
testcase_10 AC 2 ms
6,940 KB
testcase_11 AC 2 ms
6,940 KB
testcase_12 AC 2 ms
6,944 KB
testcase_13 AC 2 ms
6,940 KB
testcase_14 AC 2 ms
6,940 KB
testcase_15 AC 2 ms
6,940 KB
testcase_16 AC 2 ms
6,940 KB
testcase_17 AC 2 ms
6,940 KB
testcase_18 AC 2 ms
6,944 KB
testcase_19 AC 2 ms
6,944 KB
testcase_20 AC 2 ms
6,944 KB
testcase_21 AC 30 ms
13,200 KB
testcase_22 AC 21 ms
12,380 KB
testcase_23 AC 30 ms
14,232 KB
testcase_24 AC 12 ms
6,944 KB
testcase_25 AC 39 ms
13,208 KB
testcase_26 AC 40 ms
13,076 KB
testcase_27 AC 19 ms
13,480 KB
testcase_28 AC 20 ms
13,608 KB
testcase_29 AC 14 ms
7,936 KB
権限があれば一括ダウンロードができます

ソースコード

diff # 

/* #region Head */

#include <bits/stdc++.h>
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 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 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 << "}";
}

void pprint() { cout << endl; }
template <class Head, class... Tail> void pprint(Head &&head, Tail &&... tail) {
    cout << head;
    if (sizeof...(Tail) > 0) 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

#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__;                                                                                                  \
    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), cin.tie(nullptr), cout.tie(nullptr);
        cout << fixed << setprecision(IOS_PREC);
        if (AUTOFLUSH) cout << unitbuf;
    }
} ATCODER_INITIALIZE;

void Yn(bool p) { cout << (p ? "Yes" : "No") << endl; }
void YN(bool p) { cout << (p ? "YES" : "NO") << endl; }

/* #endregion */

// #include <atcoder/all>
// using namespace atcoder;

/* #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 {
    ll src;          // エッジ始点となる頂点
    ll 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(ll src, ll dst, weight_t weight) : src(src), dst(dst), weight(weight) {}
    Edge(ll src, ll 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:
    ll 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); }
};
// using Array = vc<Weight>;
// using Matrix = vc<Array>;

/* #endregion */

/* #region scc */

// 強連結成分分解
template <class weight_t, class flow_t> vll scc(const Graph<weight_t, flow_t> &g) {
    ll n = SIZE(g);                // ノード数
    Graph<weight_t, flow_t> rg(n); // 逆向きのグラフ
    for (const Node<weight_t, flow_t> &es : g)
        for (Edge<weight_t, flow_t> e : es) {
            swap(e.src, e.dst);
            rg[e.src].emplace_back(e);
        }

    vll order;
    order.reserve(n);

    { // dfs 1回目
        vc<bool> visited(n), added(n);
        REP(i, 0, n) {
            if (visited[i]) continue;
            stack<ll> stk;
            stk.push(i);
            while (!stk.empty()) {
                ll cur = stk.top();
                visited[cur] = true;
                bool pushed = false;
                for (const Edge<weight_t, flow_t> &e : g[cur])
                    if (!visited[e.dst]) {
                        stk.push(e.dst);
                        pushed = true;
                    }
                if (!pushed) { // カレントノードからは未訪問ノードへ到達できない
                    ll t = stk.top();
                    stk.pop(); // 未訪問ノードへ到達できないノードは除いていく
                    if (!added[t]) {
                        added[t] = true;
                        order.push_back(t);
                    }
                }
            }
        }
        reverse(ALL(order));
    }

    vll ret(n, -1);
    { // dfs 2回目
        ll groupnum = 0;
        for (ll &v : order) {
            if (ret[v] != -1) continue;
            stack<ll> stk;
            stk.push(v);
            while (!stk.empty()) {
                ll cur = stk.top();
                stk.pop();
                ret[cur] = groupnum;
                for (Edge<weight_t, flow_t> &e : rg[cur])
                    if (ret[e.dst] == -1) stk.push(e.dst);
            }
            ++groupnum;
        }
    }
    return ret;
}

/* #endregion */

template <class weight_t, class flow_t> bool has_cycle_directed(Graph<weight_t, flow_t> &graph) {
    ll n = SIZE(graph);
    vc<bool> visited(n, false);
    function<bool(ll, ll)> dfs = [&](ll idx, ll par) {
        if (visited[idx]) return true;
        visited[idx] = true;
        for (Edge<weight_t, flow_t> &edge : graph[idx])
            if (edge.dst != par && dfs(edge.dst, idx)) return true;
        return false;
    };
    vll indegrees(n, 0); // 入次数
    REP(i, 0, n) REP(j, 0, SIZE(graph[i])) indegrees[graph[i][j].dst]++;
    // 入次数が 0 になるような頂点が存在しない場合，閉路は必ず存在する（ほんと？）
    if (find(ALL(indegrees), 0LL) == indegrees.end()) return true;
    dump(111);
    REP(i, 0, n) {
        fill(ALL(visited), false);
        if (indegrees[i] == 0)
            if (dfs(i, -1)) return true;
    }
    return false;
}

template <class weight_t, class flow_t> vll get_cycle_directed(Graph<weight_t, flow_t> &graph) {
    ll n = SIZE(graph);
    vll group = scc(graph);

    um<ll, vll> mp;
    REP(i, 0, n) {
        if (mp.find(group[i]) == mp.end()) mp[group[i]] = vll();
        mp[group[i]].emplace_back(i);
    }
    REPI(itr, mp) {
        ll sz = SIZE(itr->second);
        if (sz > 1) {
            // cout << sz << endl;
            // REP(i, 0, sz) cout << itr->second[i] << endl;
            // ぐるっと1周するようなパスが複数存在する場合，すべてを出力するのは駄目
            // ぐるっと1周する閉路を横切るようなパスが存在しないような閉路を出力しないといけない
            // まずはぐるっと1周するパスを探し，それを横切るエッジがあるなら，そのエッジの終点から始点までのパスを探す
            set<ll> st;
            REP(i, 0, sz) st.insert(itr->second[i]);

            ll start = itr->second[0], term = -1;
            while (true) {
                vll visited(n, -1);
                ll visitcnt = 0;
                visited[start] = visitcnt++;

                queue<Node<weight_t, flow_t>> que; // 「訪問予定」頂点リスト

                que.push(graph[start]);
                Graph<weight_t, flow_t> g2(n);
                vc<pll> shortcut;
                while (!que.empty()) { // bfs
                    Node<weight_t, flow_t> cur = que.front();
                    que.pop();

                    for (Edge<weight_t, flow_t> &e : cur) {
                        if (st.find(e.dst) == st.end()) continue;
                        if (visited[e.dst] == 0) {
                            // dump(e.src, e.dst);
                            term = e.src;
                            continue;
                        } else if (visited[e.dst] != -1) {
                            shortcut.emplace_back(e.src, e.dst);
                            continue;
                        }
                        g2.add_arc(e.dst, e.src);
                        visited[e.dst] = visitcnt++;
                        que.push(graph[e.dst]);
                    }
                    if (term != -1) break;
                }
                vll nodes = {term};
                set<ll> st2;
                st2.insert(term);
                ll cur = term;
                while (cur != start) {
                    // なるべく番号が若いノードを辿っていく
                    ll num = INF, par = -1;
                    for (Edge<weight_t, flow_t> &e : g2[cur]) {
                        if (chmin(num, visited[e.dst])) par = e.dst;
                    }
                    nodes.push_back(par);
                    st2.insert(par);
                    cur = par;
                }
                reverse(ALL(nodes));
                if (SIZE(shortcut) == 0) return nodes;
                // ショートカットが存在しても，その両端点が nodes に入っていなければセーフ
                bool safe = true;
                for (pll &sc : shortcut) {
                    if (st2.find(sc.first) != st2.end() && st2.find(sc.second) != st2.end()) {
                        safe = false;
                        break;
                    }
                }
                if (safe) return nodes;
                start = shortcut[0].second, term = -1;
            }
        }
    }
    return vll(0);
}

// Problem
void solve() {
    VAR(ll, n, m); //
    vll a(n);
    cin >> a;
    REP(i, 0, n) a[i]--;

    // <><>...
    Graph<> graph(m);
    vll h(m, 0);       // 入ってくるエッジの本数
    REP(i, 0, n - 1) { // 小さい方から大きい方へ辺を張る
        if (a[i] == a[i + 1]) {
            Yn(false);
            return;
        }
        if (i % 2 == 0) {
            graph.add_arc(a[i], a[i + 1]);
            h[a[i + 1]]++;
            // dump(a[i], a[i + 1]);
        } else {
            graph.add_arc(a[i + 1], a[i]);
            h[a[i]]++;
            // dump(a[i + 1], a[i]);
        }
    }
    REP(i, 0, n - 2) {
        if (a[i] == a[i + 2]) {
            Yn(false);
            return;
        }
    }
    // vll cycle = get_cycle_directed(graph);
    // // if (has_cycle_directed(graph)) {
    // //     Yn(false);
    // //     return;
    // // }
    // if (SIZE(cycle) > 0) {
    //     Yn(false);
    //     return;
    // }

    stack<ll> st;
    REP(i, 0, m) if (h[i] == 0) st.push(i);

    vll ans;
    while (st.size()) {
        ll node_idx = st.top();
        st.pop();
        ans.push_back(node_idx);
        for (Edge<> &edge : graph[node_idx]) {
            h[edge.dst]--;
            if (h[edge.dst] == 0) st.push(edge.dst);
        }
    }
    // dump(ans);
    if (*max_element(ALL(h)) > 0) {
        Yn(false);
        return;
    }

    vll ret(m, 1);
    REP(i, 0, SIZE(ans)) ret[ans[i]] = i + 1;
    Yn(true);
    cout >> ret;
}

// entry point
int main() {
    solve();
    return 0;
}
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