結果
問題 | No.1301 Strange Graph Shortest Path |
ユーザー | umimel |
提出日時 | 2024-12-28 19:24:48 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 404 ms / 3,000 ms |
コード長 | 5,516 bytes |
コンパイル時間 | 2,536 ms |
コンパイル使用メモリ | 183,972 KB |
実行使用メモリ | 94,928 KB |
最終ジャッジ日時 | 2024-12-28 19:25:07 |
合計ジャッジ時間 | 16,357 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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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 | 311 ms
92,020 KB |
testcase_03 | AC | 235 ms
81,980 KB |
testcase_04 | AC | 382 ms
91,844 KB |
testcase_05 | AC | 223 ms
92,624 KB |
testcase_06 | AC | 375 ms
85,360 KB |
testcase_07 | AC | 306 ms
87,624 KB |
testcase_08 | AC | 232 ms
83,948 KB |
testcase_09 | AC | 326 ms
79,708 KB |
testcase_10 | AC | 254 ms
83,656 KB |
testcase_11 | AC | 331 ms
87,944 KB |
testcase_12 | AC | 351 ms
87,888 KB |
testcase_13 | AC | 284 ms
92,396 KB |
testcase_14 | AC | 330 ms
81,232 KB |
testcase_15 | AC | 306 ms
82,768 KB |
testcase_16 | AC | 404 ms
91,836 KB |
testcase_17 | AC | 341 ms
93,112 KB |
testcase_18 | AC | 276 ms
84,056 KB |
testcase_19 | AC | 334 ms
84,284 KB |
testcase_20 | AC | 346 ms
82,656 KB |
testcase_21 | AC | 344 ms
90,836 KB |
testcase_22 | AC | 386 ms
85,580 KB |
testcase_23 | AC | 302 ms
92,640 KB |
testcase_24 | AC | 393 ms
83,612 KB |
testcase_25 | AC | 365 ms
90,660 KB |
testcase_26 | AC | 317 ms
87,048 KB |
testcase_27 | AC | 335 ms
87,876 KB |
testcase_28 | AC | 260 ms
89,928 KB |
testcase_29 | AC | 404 ms
89,984 KB |
testcase_30 | AC | 361 ms
91,252 KB |
testcase_31 | AC | 394 ms
89,296 KB |
testcase_32 | AC | 2 ms
5,248 KB |
testcase_33 | AC | 176 ms
75,024 KB |
testcase_34 | AC | 331 ms
94,928 KB |
ソースコード
#include<bits/stdc++.h> using namespace std; using ll = long long; #define all(a) (a).begin(), (a).end() #define pb push_back #define fi first #define se second mt19937_64 rng(chrono::system_clock::now().time_since_epoch().count()); const ll MOD1000000007 = 1000000007; const ll MOD998244353 = 998244353; const ll MOD[3] = {999727999, 1070777777, 1000000007}; const ll LINF = 1LL << 60LL; const int IINF = (1 << 30) - 2; template<typename T> struct edge{ int from; int to; T cost; int id; edge(){} edge(int to, T cost=1) : from(-1), to(to), cost(cost){} edge(int from, int to, T cost) : from(from), to(to), cost(cost) {} edge(int from, int to, T cost, int id) : from(from), to(to), cost(cost), id(id){} void reverse(){swap(from, to);} }; template<typename T> struct edges : std::vector<edge<T>>{ void sort(){ std::sort( (*this).begin(), (*this).end(), [](const edge<T>& a, const edge<T>& b){ return a.cost < b.cost; } ); } }; template<typename T = bool> struct graph : std::vector<edges<T>>{ private: int n = 0; int m = 0; edges<T> es; bool dir; public: graph(int n, bool dir) : n(n), dir(dir){ (*this).resize(n); } void add_edge(int from, int to, T cost=1){ if(dir){ es.push_back(edge<T>(from, to, cost, m)); (*this)[from].push_back(edge<T>(from, to, cost, m++)); }else{ if(from > to) swap(from, to); es.push_back(edge<T>(from, to, cost, m)); (*this)[from].push_back(edge<T>(from, to, cost, m)); (*this)[to].push_back(edge<T>(to, from, cost, m++)); } } int get_vnum(){ return n; } int get_enum(){ return m; } bool get_dir(){ return dir; } edge<T> get_edge(int i){ return es[i]; } edges<T> get_edge_set(){ return es; } }; template<typename T> struct redge{ int from, to; T cap, cost; int rev; redge(int to, T cap, T cost=(T)(1)) : from(-1), to(to), cap(cap), cost(cost){} redge(int to, T cap, T cost, int rev) : from(-1), to(to), cap(cap), cost(cost), rev(rev){} }; template<typename T> using Edges = vector<edge<T>>; template<typename T> using weighted_graph = vector<Edges<T>>; template<typename T> using tree = vector<Edges<T>>; using unweighted_graph = vector<vector<int>>; template<typename T> using residual_graph = vector<vector<redge<T>>>; template<typename T> struct mincostflow{ residual_graph<T> G; const T TINF = std::numeric_limits<T>::max() / 2; int n; mincostflow(residual_graph<T> &G_){ n = (int)G_.size(); G.resize(n); for(int from=0; from<n; from++){ for(redge<T> e : G_[from]){ G[from].push_back(redge<T>(e.to, e.cap, e.cost, (int)G[e.to].size())); G[e.to].pb(redge<T>(from, 0, -e.cost, (int)G[from].size()-1)); } } } T flow(int s, int t, T f){ residual_graph<T> H(n); vector<T> h(n, 0); //ポテンシャル vector<T> dist(n, 0); //最短距離 vector<int> prevv(n, 0); // 直前の頂点 vector<int> preve(n, 0); // 直前の辺 for(int from=0; from<n; from++){ for(redge<T> e : G[from]){ H[from].push_back(e); } } T res = 0; while(f > 0){ //ダイクストラ法を用いてhを更新 priority_queue<pair<T, int>, vector<pair<T, int>>, greater<pair<T, int>>> PQ; for(int i=0; i<n; i++) dist[i] = TINF; dist[s] = 0; PQ.push({0, s}); while(!PQ.empty()){ pair<T, int> p = PQ.top(); PQ.pop(); int v = p.se; if(dist[v] < p.fi) continue; for(int i=0; i<(int)H[v].size(); i++){ redge<T> &e = H[v][i]; if(e.cap > 0 && dist[e.to] > dist[v] + e.cost + h[v] - h[e.to]){ dist[e.to] = dist[v] + e.cost + h[v] - h[e.to]; prevv[e.to] = v; preve[e.to] = i; PQ.push({dist[e.to], e.to}); } } } if(dist[t] == TINF){ //これ以上流せない return -1; } for(int v=0; v<n; v++) h[v] += dist[v]; // s-t間最短経路に沿って目一杯流す T d = f; for(int v=t; v!=s; v=prevv[v]){ d = min(d, H[prevv[v]][preve[v]].cap); } f -= d; res += d*h[t]; for(int v=t; v!=s; v=prevv[v]){ redge<T> &e = H[prevv[v]][preve[v]]; e.cap -= d; H[v][e.rev].cap += d; } } return res; } }; void solve(){ int n, m; cin >> n >> m; residual_graph<ll> G(n); for(int i=0; i<m; i++){ int u, v; cin >> u >> v; ll c, d; cin >> c >> d; u--; v--; G[u].pb(redge<ll>(v, 1, d)); G[u].pb(redge<ll>(v, 1, c)); G[v].pb(redge<ll>(u, 1, d)); G[v].pb(redge<ll>(u, 1, c)); } mincostflow<ll> mcf(G); cout << mcf.flow(0, n-1, 2) << endl; } int main(){ cin.tie(nullptr); ios::sync_with_stdio(false); int T=1; //cin >> T; while(T--) solve(); }