結果
問題 | No.1301 Strange Graph Shortest Path |
ユーザー | siman |
提出日時 | 2022-03-24 18:29:49 |
言語 | C++17(clang) (17.0.6 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 281 ms / 3,000 ms |
コード長 | 2,863 bytes |
コンパイル時間 | 3,860 ms |
コンパイル使用メモリ | 143,744 KB |
実行使用メモリ | 47,436 KB |
最終ジャッジ日時 | 2024-10-13 02:11:24 |
合計ジャッジ時間 | 14,818 ms |
ジャッジサーバーID (参考情報) |
judge3 / 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 | 6 ms
9,728 KB |
testcase_01 | AC | 6 ms
9,600 KB |
testcase_02 | AC | 242 ms
46,544 KB |
testcase_03 | AC | 205 ms
42,524 KB |
testcase_04 | AC | 276 ms
42,296 KB |
testcase_05 | AC | 220 ms
46,920 KB |
testcase_06 | AC | 250 ms
40,344 KB |
testcase_07 | AC | 239 ms
43,400 KB |
testcase_08 | AC | 205 ms
43,076 KB |
testcase_09 | AC | 244 ms
38,272 KB |
testcase_10 | AC | 217 ms
42,308 KB |
testcase_11 | AC | 258 ms
41,652 KB |
testcase_12 | AC | 257 ms
41,272 KB |
testcase_13 | AC | 243 ms
46,724 KB |
testcase_14 | AC | 233 ms
38,900 KB |
testcase_15 | AC | 238 ms
40,624 KB |
testcase_16 | AC | 281 ms
42,236 KB |
testcase_17 | AC | 255 ms
46,544 KB |
testcase_18 | AC | 233 ms
42,916 KB |
testcase_19 | AC | 252 ms
40,320 KB |
testcase_20 | AC | 258 ms
38,528 KB |
testcase_21 | AC | 256 ms
44,592 KB |
testcase_22 | AC | 264 ms
39,296 KB |
testcase_23 | AC | 243 ms
46,340 KB |
testcase_24 | AC | 271 ms
39,424 KB |
testcase_25 | AC | 272 ms
42,868 KB |
testcase_26 | AC | 248 ms
42,316 KB |
testcase_27 | AC | 261 ms
42,096 KB |
testcase_28 | AC | 222 ms
46,556 KB |
testcase_29 | AC | 277 ms
41,052 KB |
testcase_30 | AC | 272 ms
42,944 KB |
testcase_31 | AC | 270 ms
42,112 KB |
testcase_32 | AC | 6 ms
9,600 KB |
testcase_33 | AC | 166 ms
36,608 KB |
testcase_34 | AC | 258 ms
47,436 KB |
ソースコード
#include <cassert> #include <cmath> #include <algorithm> #include <iostream> #include <iomanip> #include <limits.h> #include <map> #include <queue> #include <set> #include <string.h> #include <vector> using namespace std; typedef long long ll; const int MAX_V = 200010; const ll INF = LLONG_MAX; typedef pair<ll, int> P; int V; struct Edge { int to; ll cap; ll cost; int rev; Edge(int to = -1, ll cap = -1, ll cost = -1, int rev = -1) { this->to = to; this->cap = cap; this->cost = cost; this->rev = rev; } }; ll h[MAX_V]; ll dist[MAX_V]; int prevv[MAX_V]; int preve[MAX_V]; vector <Edge> G[MAX_V]; class MinCostFlow { public: int V; MinCostFlow(int V) { this->V = V; } void add_edge(int from, int to, ll cap, ll cost) { G[from].push_back(Edge(to, cap, cost, G[to].size())); G[to].push_back(Edge(from, 0, -cost, G[from].size() - 1)); } ll min_cost_flow(int s, int t, ll flow_limit) { ll f = 0; ll totalCost = 0; fill(h, h + MAX_V, 0); while (f < flow_limit) { // fprintf(stderr, "f: %lld, limit: %lld\n", f, flow_limit); priority_queue<P, vector<P>, greater<P>> pque; fill(dist, dist + V, INF); dist[s] = 0; pque.push(P(0, s)); while (!pque.empty()) { P p = pque.top(); pque.pop(); int v = p.second; if (dist[v] < p.first) continue; for (int i = 0; i < (int) G[v].size(); ++i) { Edge *edge = &G[v][i]; if (edge->cap <= 0) continue; ll cost = edge->cost + h[v] - h[edge->to]; if (dist[edge->to] - dist[v] > cost) { dist[edge->to] = dist[v] + cost; prevv[edge->to] = v; preve[edge->to] = i; pque.push(P(dist[edge->to], edge->to)); } } } if (dist[t] == INF) { return -1; } for (int v = 0; v < V; ++v) { h[v] += dist[v]; } ll c = flow_limit - f; for (int v = t; v != s; v = prevv[v]) { c = min(c, G[prevv[v]][preve[v]].cap); } f += c; totalCost += c * h[t]; // fprintf(stderr, "h[s]: %d, h[t]: %d, cost: %d, prev_cost: %d\n", h[s], h[t], cost, prev_cost); for (int v = t; v != s; v = prevv[v]) { Edge *edge = &G[prevv[v]][preve[v]]; edge->cap -= c; G[v][edge->rev].cap += c; } } return totalCost; } }; int main() { int N, M; cin >> N >> M; V = N + 3; MinCostFlow mcf(V); int u, v; ll c, d; for (int i = 0; i < M; ++i) { cin >> u >> v >> c >> d; mcf.add_edge(u, v, 1, c); mcf.add_edge(v, u, 1, c); mcf.add_edge(u, v, 1, d); mcf.add_edge(v, u, 1, d); } int s = N + 1; int t = N + 2; mcf.add_edge(s, 1, 2, 0); mcf.add_edge(N, t, 2, 0); ll res = mcf.min_cost_flow(s, t, 2); cout << res << endl; return 0; }