#604447 (C++14) No.1341 真ん中を入れ替えて門松列

提出ソース

結果

問題	No.1341 真ん中を入れ替えて門松列
ユーザー	kotatsugame
提出日時	2021-01-15 22:30:02
言語	C++14 (gcc 12.3.0 + boost 1.83.0)
結果	AC
実行時間	1,321 ms / 2,000 ms
コード長	8,671 bytes
コンパイル時間	1,563 ms
コンパイル使用メモリ	105,948 KB
実行使用メモリ	6,944 KB
最終ジャッジ日時	2024-11-26 16:19:56
合計ジャッジ時間	12,271 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 5,248 KB
testcase_01	AC	2 ms 5,248 KB
testcase_02	AC	2 ms 5,248 KB
testcase_03	AC	2 ms 5,248 KB
testcase_04	AC	2 ms 5,248 KB
testcase_05	AC	2 ms 5,248 KB
testcase_06	AC	6 ms 5,248 KB
testcase_07	AC	501 ms 6,560 KB
testcase_08	AC	9 ms 6,180 KB
testcase_09	AC	340 ms 6,816 KB
testcase_10	AC	790 ms 6,812 KB
testcase_11	AC	791 ms 6,896 KB
testcase_12	AC	748 ms 6,692 KB
testcase_13	AC	1,031 ms 6,812 KB
testcase_14	AC	1,306 ms 6,944 KB
testcase_15	AC	1,310 ms 6,816 KB
testcase_16	AC	1,321 ms 6,820 KB
testcase_17	AC	1,302 ms 6,820 KB
testcase_18	AC	472 ms 6,564 KB

権限があれば一括ダウンロードができます

コンパイルメッセージ

main.cpp:261:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  261 | main()
      | ^~~~

ソースコード

raw source code

#include<iostream>
#include<algorithm>

#include <algorithm>
#include <cassert>
#include <limits>
#include <queue>
#include <vector>


#include <algorithm>
#include <utility>
#include <vector>

namespace atcoder {
namespace internal {

template <class E> struct csr {
    std::vector<int> start;
    std::vector<E> elist;
    csr(int n, const std::vector<std::pair<int, E>>& edges)
        : start(n + 1), elist(edges.size()) {
        for (auto e : edges) {
            start[e.first + 1]++;
        }
        for (int i = 1; i <= n; i++) {
            start[i] += start[i - 1];
        }
        auto counter = start;
        for (auto e : edges) {
            elist[counter[e.first]++] = e.second;
        }
    }
};

}  // namespace internal

}  // namespace atcoder


#include <vector>

namespace atcoder {

namespace internal {

template <class T> struct simple_queue {
    std::vector<T> payload;
    int pos = 0;
    void reserve(int n) { payload.reserve(n); }
    int size() const { return int(payload.size()) - pos; }
    bool empty() const { return pos == int(payload.size()); }
    void push(const T& t) { payload.push_back(t); }
    T& front() { return payload[pos]; }
    void clear() {
        payload.clear();
        pos = 0;
    }
    void pop() { pos++; }
};

}  // namespace internal

}  // namespace atcoder


namespace atcoder {

template <class Cap, class Cost> struct mcf_graph {
  public:
    mcf_graph() {}
    mcf_graph(int n) : _n(n) {}

    int add_edge(int from, int to, Cap cap, Cost cost) {
        assert(0 <= from && from < _n);
        assert(0 <= to && to < _n);
        assert(0 <= cap);
        assert(0 <= cost);
        int m = int(_edges.size());
        _edges.push_back({from, to, cap, 0, cost});
        return m;
    }

    struct edge {
        int from, to;
        Cap cap, flow;
        Cost cost;
    };

    edge get_edge(int i) {
        int m = int(_edges.size());
        assert(0 <= i && i < m);
        return _edges[i];
    }
    std::vector<edge> edges() { return _edges; }

    std::pair<Cap, Cost> flow(int s, int t) {
        return flow(s, t, std::numeric_limits<Cap>::max());
    }
    std::pair<Cap, Cost> flow(int s, int t, Cap flow_limit) {
        return slope(s, t, flow_limit).back();
    }
    std::vector<std::pair<Cap, Cost>> slope(int s, int t) {
        return slope(s, t, std::numeric_limits<Cap>::max());
    }
    std::vector<std::pair<Cap, Cost>> slope(int s, int t, Cap flow_limit) {
        assert(0 <= s && s < _n);
        assert(0 <= t && t < _n);
        assert(s != t);

        int m = int(_edges.size());
        std::vector<int> edge_idx(m);

        auto g = [&]() {
            std::vector<int> degree(_n), redge_idx(m);
            std::vector<std::pair<int, _edge>> elist;
            elist.reserve(2 * m);
            for (int i = 0; i < m; i++) {
                auto e = _edges[i];
                edge_idx[i] = degree[e.from]++;
                redge_idx[i] = degree[e.to]++;
                elist.push_back({e.from, {e.to, -1, e.cap - e.flow, e.cost}});
                elist.push_back({e.to, {e.from, -1, e.flow, -e.cost}});
            }
            auto _g = internal::csr<_edge>(_n, elist);
            for (int i = 0; i < m; i++) {
                auto e = _edges[i];
                edge_idx[i] += _g.start[e.from];
                redge_idx[i] += _g.start[e.to];
                _g.elist[edge_idx[i]].rev = redge_idx[i];
                _g.elist[redge_idx[i]].rev = edge_idx[i];
            }
            return _g;
        }();

        auto result = slope(g, s, t, flow_limit);

        for (int i = 0; i < m; i++) {
            auto e = g.elist[edge_idx[i]];
            _edges[i].flow = _edges[i].cap - e.cap;
        }

        return result;
    }

  private:
    int _n;
    std::vector<edge> _edges;

    struct _edge {
        int to, rev;
        Cap cap;
        Cost cost;
    };

    std::vector<std::pair<Cap, Cost>> slope(internal::csr<_edge>& g,
                                            int s,
                                            int t,
                                            Cap flow_limit) {

        std::vector<std::pair<Cost, Cost>> dual_dist(_n);
        std::vector<int> prev_e(_n);
        std::vector<bool> vis(_n);
        struct Q {
            Cost key;
            int to;
            bool operator<(Q r) const { return key > r.key; }
        };
        std::vector<int> que_min;
        std::vector<Q> que;
        auto dual_ref = [&]() {
            for (int i = 0; i < _n; i++) {
                dual_dist[i].second = std::numeric_limits<Cost>::max();
            }
            std::fill(vis.begin(), vis.end(), false);
            que_min.clear();
            que.clear();

            size_t heap_r = 0;

            dual_dist[s].second = 0;
            que_min.push_back(s);
            while (!que_min.empty() || !que.empty()) {
                int v;
                if (!que_min.empty()) {
                    v = que_min.back();
                    que_min.pop_back();
                } else {
                    while (heap_r < que.size()) {
                        heap_r++;
                        std::push_heap(que.begin(), que.begin() + heap_r);
                    }
                    v = que.front().to;
                    std::pop_heap(que.begin(), que.end());
                    que.pop_back();
                    heap_r--;
                }
                if (vis[v]) continue;
                vis[v] = true;
                if (v == t) break;
                Cost dual_v = dual_dist[v].first, dist_v = dual_dist[v].second;
                for (int i = g.start[v]; i < g.start[v + 1]; i++) {
                    auto e = g.elist[i];
                    if (!e.cap) continue;
                    Cost cost = e.cost - dual_dist[e.to].first + dual_v;
                    if (dual_dist[e.to].second - dist_v > cost) {
                        Cost dist_to = dist_v + cost;
                        dual_dist[e.to].second = dist_to;
                        prev_e[e.to] = e.rev;
                        if (dist_to == dist_v) {
                            que_min.push_back(e.to);
                        } else {
                            que.push_back(Q{dist_to, e.to});
                        }
                    }
                }
            }
            if (!vis[t]) {
                return false;
            }

            for (int v = 0; v < _n; v++) {
                if (!vis[v]) continue;
                dual_dist[v].first -= dual_dist[t].second - dual_dist[v].second;
            }
            return true;
        };
        Cap flow = 0;
        Cost cost = 0, prev_cost_per_flow = -1;
        std::vector<std::pair<Cap, Cost>> result = {{Cap(0), Cost(0)}};
        while (flow < flow_limit) {
            if (!dual_ref()) break;
            Cap c = flow_limit - flow;
            for (int v = t; v != s; v = g.elist[prev_e[v]].to) {
                c = std::min(c, g.elist[g.elist[prev_e[v]].rev].cap);
            }
            for (int v = t; v != s; v = g.elist[prev_e[v]].to) {
                auto& e = g.elist[prev_e[v]];
                e.cap += c;
                g.elist[e.rev].cap -= c;
            }
            Cost d = -dual_dist[s].first;
            flow += c;
            cost += c * d;
            if (prev_cost_per_flow == d) {
                result.pop_back();
            }
            result.push_back({flow, cost});
            prev_cost_per_flow = d;
        }
        return result;
    }
};

}  // namespace atcoder

using namespace std;
int N;
long M;
int A[3000],B[3000],C[3000];
main()
{
	cin>>N>>M;
	vector<pair<int,int> >mx(N),mi(N);
	for(int i=0;i<N;i++)
	{
		cin>>A[i]>>B[i]>>C[i];
		if(A[i]>C[i])swap(A[i],C[i]);
		mx[i]=make_pair(C[i],i);
		mi[i]=make_pair(A[i],i);
	}
	atcoder::mcf_graph<int,long>P(N*4+2);
	int st=N*4,go=st+1;
	sort(mx.begin(),mx.end());
	sort(mi.begin(),mi.end());
	for(int i=1;i<N;i++)
	{
		P.add_edge(N+mx[i].second,N+mx[i-1].second,N,0);
		P.add_edge(N+N+mi[i-1].second,N+N+mi[i].second,N,0);
	}
	for(int i=0;i<N;i++)
	{
		int mid=lower_bound(mi.begin(),mi.end(),make_pair(B[i],N))-mi.begin();
		if(mid<N)P.add_edge(i,N+N+mi[mid].second,1,0);
		int mxd=lower_bound(mx.begin(),mx.end(),make_pair(B[i],0))-mx.begin();
		if(mxd>0)P.add_edge(i,N+mx[mxd-1].second,1,(int)1e9-B[i]);
	}
	for(int i=0;i<N;i++)
	{
		P.add_edge(st,i,1,0);
		P.add_edge(N+i,3*N+i,1,0);
		P.add_edge(N+N+i,3*N+i,1,(int)1e9-C[i]);
		P.add_edge(3*N+i,go,1,0);
	}
	pair<int,long>ans=P.flow(st,go);
	if(ans.first==N)
	{
		cout<<"YES"<<endl;
		if((long)1e9*N-ans.second>=M)cout<<"KADOMATSU!"<<endl;
		else cout<<"NO"<<endl;
	}
	else cout<<"NO"<<endl;
}

yukicoder

結果

テストケース

コンパイルメッセージ

ソースコード