結果

問題 No.1341 真ん中を入れ替えて門松列
ユーザー chocoruskchocorusk
提出日時 2021-01-15 22:35:01
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
TLE  
実行時間 -
コード長 7,320 bytes
コンパイル時間 1,870 ms
コンパイル使用メモリ 155,860 KB
実行使用メモリ 12,032 KB
最終ジャッジ日時 2024-11-26 16:30:53
合計ジャッジ時間 28,048 ms
ジャッジサーバーID
（参考情報） 		judge3 / 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 1 ms
10,496 KB
testcase_01 AC 2 ms
11,388 KB
testcase_02 AC 2 ms
10,496 KB
testcase_03 AC 1 ms
11,520 KB
testcase_04 AC 2 ms
10,496 KB
testcase_05 AC 2 ms
11,392 KB
testcase_06 AC 13 ms
10,496 KB
testcase_07 AC 1,415 ms
5,760 KB
testcase_08 AC 8 ms
5,632 KB
testcase_09 AC 772 ms
5,888 KB
testcase_10 TLE -
testcase_11 TLE -
testcase_12 TLE -
testcase_13 TLE -
testcase_14 TLE -
testcase_15 TLE -
testcase_16 TLE -
testcase_17 TLE -
testcase_18 AC 1,502 ms
12,032 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 <cstdio>
#include <cstring>
#include <iostream>
#include <string>
#include <cmath>
#include <bitset>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <deque>
#include <algorithm>
#include <complex>
#include <unordered_map>
#include <unordered_set>
#include <random>
#include <cassert>
#include <fstream>
#include <utility>
#include <functional>
#include <time.h>
#include <stack>
#include <array>
#include <list>

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

namespace atcoder {

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

    int add_edge(int from, int to, Cap cap, Cost cost) {
        assert(0 <= from && from < _n);
        assert(0 <= to && to < _n);
        int m = int(pos.size());
        pos.push_back({from, int(g[from].size())});
        int from_id = int(g[from].size());
        int to_id = int(g[to].size());
        if (from == to) to_id++;
        g[from].push_back(_edge{to, to_id, cap, cost});
        g[to].push_back(_edge{from, from_id, 0, -cost});
        return m;
    }

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

    edge get_edge(int i) {
        int m = int(pos.size());
        assert(0 <= i && i < m);
        auto _e = g[pos[i].first][pos[i].second];
        auto _re = g[_e.to][_e.rev];
        return edge{
            pos[i].first, _e.to, _e.cap + _re.cap, _re.cap, _e.cost,
        };
    }
    std::vector<edge> edges() {
        int m = int(pos.size());
        std::vector<edge> result(m);
        for (int i = 0; i < m; i++) {
            result[i] = get_edge(i);
        }
        return result;
    }

    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);
        // variants (C = maxcost):
        // -(n-1)C <= dual[s] <= dual[i] <= dual[t] = 0
        // reduced cost (= e.cost + dual[e.from] - dual[e.to]) >= 0 for all edge
        std::vector<Cost> dual(_n, 0), dist(_n);
        std::vector<int> pv(_n), pe(_n);
        std::vector<bool> vis(_n);
        auto dual_ref = [&]() {
            std::fill(dist.begin(), dist.end(),
                      std::numeric_limits<Cost>::max());
            std::fill(pv.begin(), pv.end(), -1);
            std::fill(pe.begin(), pe.end(), -1);
            std::fill(vis.begin(), vis.end(), false);
            struct Q {
                Cost key;
                int to;
                bool operator<(Q r) const { return key > r.key; }
            };
            std::priority_queue<Q> que;
            dist[s] = 0;
            que.push(Q{0, s});
            while (!que.empty()) {
                int v = que.top().to;
                que.pop();
                if (vis[v]) continue;
                vis[v] = true;
                if (v == t) break;
                // dist[v] = shortest(s, v) + dual[s] - dual[v]
                // dist[v] >= 0 (all reduced cost are positive)
                // dist[v] <= (n-1)C
                for (int i = 0; i < int(g[v].size()); i++) {
                    auto e = g[v][i];
                    if (vis[e.to] || !e.cap) continue;
                    // |-dual[e.to] + dual[v]| <= (n-1)C
                    // cost <= C - -(n-1)C + 0 = nC
                    Cost cost = e.cost - dual[e.to] + dual[v];
                    if (dist[e.to] - dist[v] > cost) {
                        dist[e.to] = dist[v] + cost;
                        pv[e.to] = v;
                        pe[e.to] = i;
                        que.push(Q{dist[e.to], e.to});
                    }
                }
            }
            if (!vis[t]) {
                return false;
            }

            for (int v = 0; v < _n; v++) {
                if (!vis[v]) continue;
                // dual[v] = dual[v] - dist[t] + dist[v]
                //         = dual[v] - (shortest(s, t) + dual[s] - dual[t]) + (shortest(s, v) + dual[s] - dual[v])
                //         = - shortest(s, t) + dual[t] + shortest(s, v)
                //         = shortest(s, v) - shortest(s, t) >= 0 - (n-1)C
                dual[v] -= dist[t] - dist[v];
            }
            return true;
        };
        Cap flow = 0;
        Cost cost = 0, prev_cost_per_flow = -1;
        std::vector<std::pair<Cap, Cost>> result;
        result.push_back({flow, cost});
        while (flow < flow_limit) {
            if (!dual_ref()) break;
            Cap c = flow_limit - flow;
            for (int v = t; v != s; v = pv[v]) {
                c = std::min(c, g[pv[v]][pe[v]].cap);
            }
            for (int v = t; v != s; v = pv[v]) {
                auto& e = g[pv[v]][pe[v]];
                e.cap -= c;
                g[v][e.rev].cap += c;
            }
            Cost d = -dual[s];
            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;
    }

  private:
    int _n;

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

    std::vector<std::pair<int, int>> pos;
    std::vector<std::vector<_edge>> g;
};

}  // namespace atcoder

#define popcount __builtin_popcount
using namespace std;
using namespace atcoder;
typedef long long ll;
typedef pair<ll, ll> P;

int main()
{
    int n; ll m; cin>>n>>m;
    ll a[3030], b[3030], c[3030];
    vector<P> v(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]);
        v[i]=P(a[i], c[i]);
    }
    sort(v.begin(), v.end());
    vector<P> w(n);
    for(int i=0; i<n; i++){
        w[i]=P(v[i].second, i);
    }
    sort(w.begin(), w.end());
    const ll MAX=1e9;
    int s=4*n, t=4*n+1;
    mcf_graph<ll, ll> g(4*n+2);
    for(int i=0; i<n; i++){
        g.add_edge(s, i, 1, 0);
    }
    for(int i=0; i<n; i++){
        int p=lower_bound(v.begin(), v.end(), P(b[i], MAX+7))-v.begin();
        if(p<n){
            g.add_edge(i, n+p, 1, 0);
        }
    }
    for(int i=0; i<n-1; i++) g.add_edge(n+i, n+i+1, n, 0);
    for(int i=0; i<n; i++){
        int p=lower_bound(w.begin(), w.end(), P(b[i], 0))-w.begin();
        if(p>0){
            g.add_edge(i, 2*n+p-1, 1, MAX-b[i]);
        }
    }
    for(int i=0; i<n-1; i++) g.add_edge(2*n+i+1, 2*n+i, n, 0);
    for(int i=0; i<n; i++){
        g.add_edge(n+i, 3*n+i, 1, MAX-v[i].second);
        int p=w[i].second;
        g.add_edge(2*n+i, 3*n+p, 1, 0);
    }
    for(int i=0; i<n; i++) g.add_edge(3*n+i, t, 1, 0);
    auto res=g.flow(s, t, n);
    if(res.first<n){
        cout<<"NO"<<endl;
        return 0;
    }
    cout<<"YES"<<endl;
    //cout<<MAX*n-res.second<<endl;
    if(MAX*n-res.second>=m) cout<<"KADOMATSU!"<<endl;
    else cout<<"NO"<<endl;
    return 0;
}
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