結果

問題 No.1745 Selfish Spies 2 (à la Princess' Perfectionism)
ユーザー tokusakuraitokusakurai
提出日時 2021-11-14 21:47:18
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 146 ms / 5,000 ms
コード長 7,913 bytes
コンパイル時間 2,316 ms
コンパイル使用メモリ 223,028 KB
実行使用メモリ 23,308 KB
最終ジャッジ日時 2024-05-07 13:51:39
合計ジャッジ時間 6,471 ms
ジャッジサーバーID
(参考情報)
judge3 / judge5
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 1 ms
6,820 KB
testcase_02 AC 2 ms
6,944 KB
testcase_03 AC 2 ms
6,940 KB
testcase_04 AC 2 ms
6,944 KB
testcase_05 AC 1 ms
6,944 KB
testcase_06 AC 1 ms
6,940 KB
testcase_07 AC 2 ms
6,940 KB
testcase_08 AC 2 ms
6,944 KB
testcase_09 AC 2 ms
6,940 KB
testcase_10 AC 1 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
6,944 KB
testcase_14 AC 2 ms
6,940 KB
testcase_15 AC 2 ms
6,940 KB
testcase_16 AC 2 ms
6,944 KB
testcase_17 AC 2 ms
6,940 KB
testcase_18 AC 2 ms
6,940 KB
testcase_19 AC 1 ms
6,944 KB
testcase_20 AC 2 ms
6,940 KB
testcase_21 AC 2 ms
6,940 KB
testcase_22 AC 2 ms
6,940 KB
testcase_23 AC 2 ms
6,944 KB
testcase_24 AC 6 ms
6,944 KB
testcase_25 AC 2 ms
6,944 KB
testcase_26 AC 2 ms
6,944 KB
testcase_27 AC 4 ms
6,944 KB
testcase_28 AC 24 ms
6,940 KB
testcase_29 AC 4 ms
6,944 KB
testcase_30 AC 3 ms
6,944 KB
testcase_31 AC 4 ms
6,940 KB
testcase_32 AC 4 ms
6,944 KB
testcase_33 AC 24 ms
6,940 KB
testcase_34 AC 22 ms
6,948 KB
testcase_35 AC 35 ms
6,944 KB
testcase_36 AC 35 ms
6,940 KB
testcase_37 AC 30 ms
6,944 KB
testcase_38 AC 29 ms
6,940 KB
testcase_39 AC 11 ms
6,944 KB
testcase_40 AC 19 ms
6,944 KB
testcase_41 AC 17 ms
6,940 KB
testcase_42 AC 34 ms
6,944 KB
testcase_43 AC 48 ms
7,808 KB
testcase_44 AC 69 ms
9,344 KB
testcase_45 AC 119 ms
13,436 KB
testcase_46 AC 122 ms
13,568 KB
testcase_47 AC 135 ms
22,012 KB
testcase_48 AC 146 ms
21,880 KB
testcase_49 AC 91 ms
7,808 KB
testcase_50 AC 80 ms
7,680 KB
testcase_51 AC 23 ms
6,940 KB
testcase_52 AC 19 ms
6,940 KB
testcase_53 AC 24 ms
6,944 KB
testcase_54 AC 70 ms
9,344 KB
testcase_55 AC 72 ms
9,088 KB
testcase_56 AC 122 ms
9,984 KB
testcase_57 AC 133 ms
23,308 KB
testcase_58 AC 135 ms
23,184 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 #

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < n; i++)
#define rep2(i, x, n) for (int i = x; i <= n; i++)
#define rep3(i, x, n) for (int i = x; i >= n; i--)
#define each(e, v) for (auto &e : v)
#define pb push_back
#define eb emplace_back
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define sz(x) (int)x.size()
using ll = long long;
using pii = pair<int, int>;
using pil = pair<int, ll>;
using pli = pair<ll, int>;
using pll = pair<ll, ll>;

template <typename T>
bool chmax(T &x, const T &y) {
    return (x < y) ? (x = y, true) : false;
}

template <typename T>
bool chmin(T &x, const T &y) {
    return (x > y) ? (x = y, true) : false;
}

template <typename T>
int flg(T x, int i) {
    return (x >> i) & 1;
}

template <typename T>
void print(const vector<T> &v, T x = 0) {
    int n = v.size();
    for (int i = 0; i < n; i++) cout << v[i] + x << (i == n - 1 ? '\n' : ' ');
    if (v.empty()) cout << '\n';
}

template <typename T>
void printn(const vector<T> &v, T x = 0) {
    int n = v.size();
    for (int i = 0; i < n; i++) cout << v[i] + x << '\n';
}

template <typename T>
int lb(const vector<T> &v, T x) {
    return lower_bound(begin(v), end(v), x) - begin(v);
}

template <typename T>
int ub(const vector<T> &v, T x) {
    return upper_bound(begin(v), end(v), x) - begin(v);
}

template <typename T>
void rearrange(vector<T> &v) {
    sort(begin(v), end(v));
    v.erase(unique(begin(v), end(v)), end(v));
}

template <typename T>
vector<int> id_sort(const vector<T> &v, bool greater = false) {
    int n = v.size();
    vector<int> ret(n);
    iota(begin(ret), end(ret), 0);
    sort(begin(ret), end(ret), [&](int i, int j) { return greater ? v[i] > v[j] : v[i] < v[j]; });
    return ret;
}

template <typename S, typename T>
pair<S, T> operator+(const pair<S, T> &p, const pair<S, T> &q) {
    return make_pair(p.first + q.first, p.second + q.second);
}

template <typename S, typename T>
pair<S, T> operator-(const pair<S, T> &p, const pair<S, T> &q) {
    return make_pair(p.first - q.first, p.second - q.second);
}

template <typename S, typename T>
istream &operator>>(istream &is, pair<S, T> &p) {
    S a;
    T b;
    is >> a >> b;
    p = make_pair(a, b);
    return is;
}

template <typename S, typename T>
ostream &operator<<(ostream &os, const pair<S, T> &p) {
    return os << p.first << ' ' << p.second;
}

struct io_setup {
    io_setup() {
        ios_base::sync_with_stdio(false);
        cin.tie(NULL);
        cout << fixed << setprecision(15);
    }
} io_setup;

const int inf = (1 << 30) - 1;
const ll INF = (1LL << 60) - 1;
const int MOD = 1000000007;
// const int MOD = 998244353;

struct Bipartite_Matching {
    vector<vector<int>> es;
    vector<int> d, match;
    vector<bool> used, used2;
    const int n, m;

    Bipartite_Matching(int n, int m) : es(n), d(n), match(m), used(n), used2(n), n(n), m(m) {}

    void add_edge(int u, int v) { es[u].push_back(v); }

    void _bfs() {
        fill(begin(d), end(d), -1);
        queue<int> que;
        for (int i = 0; i < n; i++) {
            if (!used[i]) {
                que.push(i);
                d[i] = 0;
            }
        }
        while (!que.empty()) {
            int i = que.front();
            que.pop();
            for (auto &e : es[i]) {
                int j = match[e];
                if (j != -1 && d[j] == -1) {
                    que.push(j);
                    d[j] = d[i] + 1;
                }
            }
        }
    }

    bool _dfs(int now) {
        used2[now] = true;
        for (auto &e : es[now]) {
            int u = match[e];
            if (u == -1 || (!used2[u] && d[u] == d[now] + 1 && _dfs(u))) {
                match[e] = now, used[now] = true;
                return true;
            }
        }
        return false;
    }

    int bipartite_matching() { // 右側のiは左側のmatch[i]とマッチングする
        fill(begin(match), end(match), -1), fill(begin(used), end(used), false);
        int ret = 0;
        while (true) {
            _bfs();
            fill(begin(used2), end(used2), false);
            int flow = 0;
            for (int i = 0; i < n; i++) {
                if (!used[i] && _dfs(i)) flow++;
            }
            if (flow == 0) break;
            ret += flow;
        }
        return ret;
    }
};

struct Dulmage_Mendelsohn_Decomposition : Bipartite_Matching {
    using BM = Bipartite_Matching;
    vector<vector<int>> rs;
    vector<vector<int>> ids_l, ids_r; // 左側と右側のブロック
    vector<int> comp_l, comp_r;       // 属するブロックの番号
    vector<int> vs;

    Dulmage_Mendelsohn_Decomposition(int n, int m) : BM(n, m), rs(n), comp_l(n), comp_r(m) {}

    void _dfs(int now, int col) {
        if (comp_l[now] != n + 1) return;
        comp_l[now] = col;
        for (auto &e : this->es[now]) {
            int to = this->match[e];
            if (to != -1) _dfs(to, col);
        }
        if (col > 0) vs.push_back(now);
    }

    void _rdfs(int now, int col) {
        if (comp_l[now] != n + 1) return;
        comp_l[now] = col;
        for (auto &e : rs[now]) _rdfs(e, col);
    }

    void decompose() {
        this->bipartite_matching();
        for (int i = 0; i < n; i++) {
            for (auto &e : this->es[i]) {
                int to = this->match[e];
                if (to != -1) rs[to].push_back(i);
            }
        }
        fill(begin(comp_l), end(comp_l), n + 1);
        for (int i = 0; i < n; i++) {
            bool flag = true;
            for (auto &e : es[i]) {
                if (this->match[e] == -1) {
                    _rdfs(i, 0);
                    flag = false;
                } else if (this->match[e] == i) {
                    flag = false;
                }
            }
            if (flag) _dfs(i, -1);
        }
        for (int i = 0; i < n; i++) _dfs(i, 1);
        for (int i = 0; i < n; i++) {
            if (comp_l[i] > 0) comp_l[i] = n + 1;
        }
        reverse(begin(vs), end(vs));
        int cnt = 1;
        for (auto &e : vs) {
            if (comp_l[e] == n + 1) _rdfs(e, cnt++);
        }
        for (int i = 0; i < n; i++) {
            if (comp_l[i] == -1) comp_l[i] = cnt;
        }
        for (int i = 0; i < m; i++) {
            if (this->match[i] == -1) {
                comp_r[i] = 0;
            } else {
                comp_r[i] = comp_l[this->match[i]];
            }
        }
        ids_l.resize(cnt + 1), ids_r.resize(cnt + 1);
        for (int i = 0; i < m; i++) {
            if (this->match[i] == -1) ids_r[0].push_back(i);
        }
        vector<bool> used(n, false);
        for (int i = 0; i < m; i++) {
            int e = this->match[i];
            if (e != -1) {
                ids_l[comp_l[e]].push_back(e);
                ids_r[comp_r[i]].push_back(i);
                used[e] = true;
            }
        }
        for (int i = 0; i < n; i++) {
            if (!used[i]) ids_l[cnt].push_back(i);
        }
    }
};

int main() {
    int N, M, L;
    cin >> N >> M >> L;

    Dulmage_Mendelsohn_Decomposition DM(N, M);

    vector<int> u(L), v(L);
    rep(i, L) {
        cin >> u[i] >> v[i];
        u[i]--, v[i]--;
        DM.add_edge(u[i], v[i]);
    }

    DM.decompose();
    int K = sz(DM.ids_l);
    // cout << K << '\n';
    // print(DM.comp_l), print(DM.comp_r);

    vector<int> d1(N, 0), d2(M, 0);

    rep(i, L) {
        if (DM.comp_r[v[i]] == 0) d1[u[i]]++;
        if (DM.comp_l[u[i]] == K - 1) d2[v[i]]++;
    }

    vector<bool> ans(L, true);

    rep(i, L) {
        if (DM.comp_r[v[i]] == 0) {
            // if (d1[u[i]] == 1) ans[i] = false;
        } else if (DM.comp_l[u[i]] == K - 1) {
            // if (d2[v[i]] == 1) ans[i] = false;
        } else if (DM.comp_l[u[i]] != DM.comp_r[v[i]]) {
            ans[i] = false;
        }
    }

    rep(i, L) cout << (ans[i] ? "Yes\n" : "No\n");
}
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