結果
問題 | No.580 旅館の予約計画 |
ユーザー | anta |
提出日時 | 2017-10-22 23:52:30 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 78 ms / 2,000 ms |
コード長 | 3,946 bytes |
コンパイル時間 | 2,138 ms |
コンパイル使用メモリ | 187,624 KB |
実行使用メモリ | 5,248 KB |
最終ジャッジ日時 | 2024-11-21 14:36:53 |
合計ジャッジ時間 | 4,087 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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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 | 3 ms
5,248 KB |
testcase_01 | AC | 4 ms
5,248 KB |
testcase_02 | AC | 4 ms
5,248 KB |
testcase_03 | AC | 6 ms
5,248 KB |
testcase_04 | AC | 8 ms
5,248 KB |
testcase_05 | AC | 5 ms
5,248 KB |
testcase_06 | AC | 5 ms
5,248 KB |
testcase_07 | AC | 23 ms
5,248 KB |
testcase_08 | AC | 7 ms
5,248 KB |
testcase_09 | AC | 9 ms
5,248 KB |
testcase_10 | AC | 19 ms
5,248 KB |
testcase_11 | AC | 32 ms
5,248 KB |
testcase_12 | AC | 28 ms
5,248 KB |
testcase_13 | AC | 14 ms
5,248 KB |
testcase_14 | AC | 12 ms
5,248 KB |
testcase_15 | AC | 78 ms
5,248 KB |
testcase_16 | AC | 44 ms
5,248 KB |
testcase_17 | AC | 43 ms
5,248 KB |
testcase_18 | AC | 45 ms
5,248 KB |
testcase_19 | AC | 66 ms
5,248 KB |
testcase_20 | AC | 31 ms
5,248 KB |
testcase_21 | AC | 33 ms
5,248 KB |
testcase_22 | AC | 9 ms
5,248 KB |
testcase_23 | AC | 18 ms
5,248 KB |
testcase_24 | AC | 25 ms
5,248 KB |
testcase_25 | AC | 20 ms
5,248 KB |
testcase_26 | AC | 11 ms
5,248 KB |
testcase_27 | AC | 11 ms
5,248 KB |
testcase_28 | AC | 9 ms
5,248 KB |
testcase_29 | AC | 9 ms
5,248 KB |
testcase_30 | AC | 24 ms
5,248 KB |
testcase_31 | AC | 33 ms
5,248 KB |
testcase_32 | AC | 23 ms
5,248 KB |
testcase_33 | AC | 65 ms
5,248 KB |
testcase_34 | AC | 20 ms
5,248 KB |
testcase_35 | AC | 5 ms
5,248 KB |
ソースコード
#include "bits/stdc++.h" using namespace std; #define rep(i,n) for(int (i)=0;(i)<(int)(n);++(i)) #define rer(i,l,u) for(int (i)=(int)(l);(i)<=(int)(u);++(i)) #define reu(i,l,u) for(int (i)=(int)(l);(i)<(int)(u);++(i)) static const int INF = 0x3f3f3f3f; static const long long INFL = 0x3f3f3f3f3f3f3f3fLL; typedef vector<int> vi; typedef pair<int, int> pii; typedef vector<pair<int, int> > vpii; typedef long long ll; template<typename T, typename U> static void amin(T &x, U y) { if (y < x) x = y; } template<typename T, typename U> static void amax(T &x, U y) { if (x < y) x = y; } struct MinimumCostMaximumFlow { typedef int Index; typedef int Flow; typedef int Cost; static const Flow InfCapacity = INF; static const Cost InfCost = INF; struct Edge { Index to; Index rev; Flow capacity; Cost cost; }; vector<vector<Edge> > g; void init(Index n) { g.assign(n, vector<Edge>()); } void add(Index i, Index j, Flow capacity = InfCapacity, Cost cost = Cost()) { Edge e, f; e.to = j, f.to = i; e.capacity = capacity, f.capacity = 0; e.cost = cost, f.cost = -cost; g[i].push_back(e); g[j].push_back(f); g[i].back().rev = (Index)g[j].size() - 1; g[j].back().rev = (Index)g[i].size() - 1; } void addB(Index i, Index j, Flow capacity = InfCapacity, Cost cost = Cost()) { add(i, j, capacity, cost); add(j, i, capacity, cost); } pair<Cost, Flow> minimumCostMaximumFlow(Index s, Index t, Flow f = InfCapacity, bool useSPFA = false) { int n = g.size(); vector<Cost> dist(n); vector<Index> prev(n); vector<Index> prevEdge(n); pair<Cost, Flow> total = make_pair(0, 0); vector<Cost> potential(n); while (f > 0) { fill(dist.begin(), dist.end(), InfCost); if (useSPFA || total.second == 0) { deque<Index> q; q.push_back(s); dist[s] = 0; vector<bool> inqueue(n); while (!q.empty()) { Index i = q.front(); q.pop_front(); inqueue[i] = false; for (Index ei = 0; ei < (Index)g[i].size(); ei ++) { const Edge &e = g[i][ei]; Index j = e.to; Cost d = dist[i] + e.cost; if (e.capacity > 0 && d < dist[j]) { if (!inqueue[j]) { inqueue[j] = true; q.push_back(j); } dist[j] = d; prev[j] = i; prevEdge[j] = ei; } } } } else { vector<bool> vis(n); priority_queue<pair<Cost, Index> > q; q.push(make_pair(-0, s)); dist[s] = 0; while (!q.empty()) { Index i = q.top().second; q.pop(); if (vis[i]) continue; vis[i] = true; for (Index ei = 0; ei < (Index)g[i].size(); ei ++) { const Edge &e = g[i][ei]; if (e.capacity <= 0) continue; Index j = e.to; Cost d = dist[i] + e.cost + potential[i] - potential[j]; if (dist[j] > d) { dist[j] = d; prev[j] = i; prevEdge[j] = ei; q.push(make_pair(-d, j)); } } } } if (dist[t] == InfCost) break; if (!useSPFA) for (Index i = 0; i < n; i ++) potential[i] += dist[i]; Flow d = f; Cost distt = 0; for (Index v = t; v != s; ) { Index u = prev[v]; const Edge &e = g[u][prevEdge[v]]; d = min(d, e.capacity); distt += e.cost; v = u; } f -= d; total.first += d * distt; total.second += d; for (Index v = t; v != s; v = prev[v]) { Edge &e = g[prev[v]][prevEdge[v]]; e.capacity -= d; g[e.to][e.rev].capacity += d; } } return total; } }; int main() { int N; int M; while (~scanf("%d%d", &N, &M)) { MinimumCostMaximumFlow mcmf; const int X = 7 * 60 * 24 + 1; const int src = X, dst = src + 1; mcmf.init(dst + 1); rep(i, src - 1) mcmf.add(i, i + 1, INF, 0); mcmf.add(src, 0, N); mcmf.add(X - 1, dst, N); rep(i, M) { pair<int, int> p; rep(k, 2) { int d, h, m; scanf("%d %d:%d", &d, &h, &m); d -= 2; int x = (d * 24 + h) * 60 + m; if (k == 0) p.first = x; else p.second = x + 1; } mcmf.add(p.first, p.second, 1, -1); } int ans = -mcmf.minimumCostMaximumFlow(src, dst, N).first; printf("%d\n", ans); } return 0; }