This documentation is automatically generated by online-judge-tools/verification-helper
// competitive-verifier: PROBLEM http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=GRL_6_B
#include "../../template/template.hpp"
#include "../../graph/flow/primal-dual.hpp"
int main() {
int V, E, F;
scanf("%d %d %d", &V, &E, &F);
PrimalDual< int, int > g(V);
for(int i = 0; i < E; i++) {
int a, b, c, d;
scanf("%d %d %d %d", &a, &b, &c, &d);
g.add_edge(a, b, c, d);
}
printf("%d\n", g.min_cost_flow(0, V - 1, F));
}
#line 1 "test/verify/aoj-grl-6-b.test.cpp"
// competitive-verifier: PROBLEM http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=GRL_6_B
#line 1 "template/template.hpp"
#include <bits/stdc++.h>
using namespace std;
using int64 = long long;
const int64 infll = (1LL << 62) - 1;
const int inf = (1 << 30) - 1;
struct IoSetup {
IoSetup() {
cin.tie(nullptr);
ios::sync_with_stdio(false);
cout << fixed << setprecision(10);
cerr << fixed << setprecision(10);
}
} iosetup;
template <typename T1, typename T2>
ostream &operator<<(ostream &os, const pair<T1, T2> &p) {
os << p.first << " " << p.second;
return os;
}
template <typename T1, typename T2>
istream &operator>>(istream &is, pair<T1, T2> &p) {
is >> p.first >> p.second;
return is;
}
template <typename T>
ostream &operator<<(ostream &os, const vector<T> &v) {
for (int i = 0; i < (int)v.size(); i++) {
os << v[i] << (i + 1 != v.size() ? " " : "");
}
return os;
}
template <typename T>
istream &operator>>(istream &is, vector<T> &v) {
for (T &in : v) is >> in;
return is;
}
template <typename T1, typename T2>
inline bool chmax(T1 &a, T2 b) {
return a < b && (a = b, true);
}
template <typename T1, typename T2>
inline bool chmin(T1 &a, T2 b) {
return a > b && (a = b, true);
}
template <typename T = int64>
vector<T> make_v(size_t a) {
return vector<T>(a);
}
template <typename T, typename... Ts>
auto make_v(size_t a, Ts... ts) {
return vector<decltype(make_v<T>(ts...))>(a, make_v<T>(ts...));
}
template <typename T, typename V>
typename enable_if<is_class<T>::value == 0>::type fill_v(T &t, const V &v) {
t = v;
}
template <typename T, typename V>
typename enable_if<is_class<T>::value != 0>::type fill_v(T &t, const V &v) {
for (auto &e : t) fill_v(e, v);
}
template <typename F>
struct FixPoint : F {
explicit FixPoint(F &&f) : F(forward<F>(f)) {}
template <typename... Args>
decltype(auto) operator()(Args &&...args) const {
return F::operator()(*this, forward<Args>(args)...);
}
};
template <typename F>
inline decltype(auto) MFP(F &&f) {
return FixPoint<F>{forward<F>(f)};
}
#line 4 "test/verify/aoj-grl-6-b.test.cpp"
#line 1 "graph/flow/primal-dual.hpp"
/**
* @brief Primal Dual(最小費用流)
*
*/
template <typename flow_t, typename cost_t>
struct PrimalDual {
struct edge {
int to;
flow_t cap;
cost_t cost;
int rev;
bool isrev;
};
vector<vector<edge> > graph;
vector<cost_t> potential, min_cost;
vector<int> prevv, preve;
const cost_t INF;
PrimalDual(int V) : graph(V), INF(numeric_limits<cost_t>::max()) {}
void add_edge(int from, int to, flow_t cap, cost_t cost) {
graph[from].emplace_back(
(edge){to, cap, cost, (int)graph[to].size(), false});
graph[to].emplace_back(
(edge){from, 0, -cost, (int)graph[from].size() - 1, true});
}
cost_t min_cost_flow(int s, int t, flow_t f) {
int V = (int)graph.size();
cost_t ret = 0;
using Pi = pair<cost_t, int>;
priority_queue<Pi, vector<Pi>, greater<Pi> > que;
potential.assign(V, 0);
preve.assign(V, -1);
prevv.assign(V, -1);
while (f > 0) {
min_cost.assign(V, INF);
que.emplace(0, s);
min_cost[s] = 0;
while (!que.empty()) {
Pi p = que.top();
que.pop();
if (min_cost[p.second] < p.first) continue;
for (int i = 0; i < (int)graph[p.second].size(); i++) {
edge &e = graph[p.second][i];
cost_t nextCost = min_cost[p.second] + e.cost + potential[p.second] -
potential[e.to];
if (e.cap > 0 && min_cost[e.to] > nextCost) {
min_cost[e.to] = nextCost;
prevv[e.to] = p.second, preve[e.to] = i;
que.emplace(min_cost[e.to], e.to);
}
}
}
if (min_cost[t] == INF) return -1;
for (int v = 0; v < V; v++) potential[v] += min_cost[v];
flow_t addflow = f;
for (int v = t; v != s; v = prevv[v]) {
addflow = min(addflow, graph[prevv[v]][preve[v]].cap);
}
f -= addflow;
ret += addflow * potential[t];
for (int v = t; v != s; v = prevv[v]) {
edge &e = graph[prevv[v]][preve[v]];
e.cap -= addflow;
graph[v][e.rev].cap += addflow;
}
}
return ret;
}
void output() {
for (int i = 0; i < graph.size(); i++) {
for (auto &e : graph[i]) {
if (e.isrev) continue;
auto &rev_e = graph[e.to][e.rev];
cout << i << "->" << e.to << " (flow: " << rev_e.cap << "/"
<< rev_e.cap + e.cap << ")" << endl;
}
}
}
};
#line 6 "test/verify/aoj-grl-6-b.test.cpp"
int main() {
int V, E, F;
scanf("%d %d %d", &V, &E, &F);
PrimalDual< int, int > g(V);
for(int i = 0; i < E; i++) {
int a, b, c, d;
scanf("%d %d %d %d", &a, &b, &c, &d);
g.add_edge(a, b, c, d);
}
printf("%d\n", g.min_cost_flow(0, V - 1, F));
}
Env | Name | Status | Elapsed | Memory |
---|---|---|---|---|
g++ | 00_sample_00.in | AC | 6 ms | 4 MB |
g++ | 01_small_00.in | AC | 6 ms | 4 MB |
g++ | 01_small_01.in | AC | 6 ms | 4 MB |
g++ | 01_small_02.in | AC | 6 ms | 4 MB |
g++ | 01_small_03.in | AC | 6 ms | 4 MB |
g++ | 02_corner_00.in | AC | 6 ms | 4 MB |
g++ | 02_corner_01.in | AC | 6 ms | 4 MB |
g++ | 02_corner_02.in | AC | 6 ms | 4 MB |
g++ | 03_random_00.in | AC | 6 ms | 4 MB |
g++ | 03_random_01.in | AC | 6 ms | 4 MB |
g++ | 03_random_02.in | AC | 6 ms | 4 MB |
g++ | 03_random_03.in | AC | 6 ms | 4 MB |
g++ | 03_random_04.in | AC | 6 ms | 4 MB |
g++ | 03_random_05.in | AC | 6 ms | 4 MB |
g++ | 03_random_06.in | AC | 7 ms | 4 MB |
g++ | 03_random_07.in | AC | 7 ms | 4 MB |
g++ | 04_rand_00.in | AC | 6 ms | 4 MB |
g++ | 04_rand_01.in | AC | 6 ms | 4 MB |
g++ | 04_rand_02.in | AC | 6 ms | 4 MB |
g++ | 04_rand_03.in | AC | 7 ms | 4 MB |
g++ | 04_rand_04.in | AC | 6 ms | 4 MB |
g++ | 04_rand_05.in | AC | 6 ms | 4 MB |
g++ | 04_rand_06.in | AC | 6 ms | 4 MB |
g++ | 04_rand_07.in | AC | 6 ms | 4 MB |
g++ | 05_large_00.in | AC | 7 ms | 4 MB |
g++ | 05_large_01.in | AC | 7 ms | 4 MB |
g++ | 05_large_02.in | AC | 7 ms | 4 MB |
g++ | 05_large_03.in | AC | 6 ms | 4 MB |
g++ | 06_biased_00.in | AC | 7 ms | 4 MB |
g++ | 06_biased_01.in | AC | 7 ms | 4 MB |
g++ | 06_biased_02.in | AC | 7 ms | 4 MB |
g++ | 06_biased_03.in | AC | 7 ms | 4 MB |
clang++ | 00_sample_00.in | AC | 6 ms | 4 MB |
clang++ | 01_small_00.in | AC | 6 ms | 4 MB |
clang++ | 01_small_01.in | AC | 6 ms | 4 MB |
clang++ | 01_small_02.in | AC | 6 ms | 4 MB |
clang++ | 01_small_03.in | AC | 6 ms | 4 MB |
clang++ | 02_corner_00.in | AC | 6 ms | 4 MB |
clang++ | 02_corner_01.in | AC | 6 ms | 4 MB |
clang++ | 02_corner_02.in | AC | 6 ms | 4 MB |
clang++ | 03_random_00.in | AC | 6 ms | 4 MB |
clang++ | 03_random_01.in | AC | 6 ms | 4 MB |
clang++ | 03_random_02.in | AC | 6 ms | 4 MB |
clang++ | 03_random_03.in | AC | 6 ms | 4 MB |
clang++ | 03_random_04.in | AC | 6 ms | 4 MB |
clang++ | 03_random_05.in | AC | 7 ms | 4 MB |
clang++ | 03_random_06.in | AC | 6 ms | 4 MB |
clang++ | 03_random_07.in | AC | 6 ms | 4 MB |
clang++ | 04_rand_00.in | AC | 6 ms | 4 MB |
clang++ | 04_rand_01.in | AC | 6 ms | 4 MB |
clang++ | 04_rand_02.in | AC | 6 ms | 4 MB |
clang++ | 04_rand_03.in | AC | 6 ms | 4 MB |
clang++ | 04_rand_04.in | AC | 7 ms | 4 MB |
clang++ | 04_rand_05.in | AC | 7 ms | 4 MB |
clang++ | 04_rand_06.in | AC | 6 ms | 4 MB |
clang++ | 04_rand_07.in | AC | 6 ms | 4 MB |
clang++ | 05_large_00.in | AC | 7 ms | 4 MB |
clang++ | 05_large_01.in | AC | 7 ms | 4 MB |
clang++ | 05_large_02.in | AC | 7 ms | 4 MB |
clang++ | 05_large_03.in | AC | 7 ms | 4 MB |
clang++ | 06_biased_00.in | AC | 7 ms | 4 MB |
clang++ | 06_biased_01.in | AC | 7 ms | 4 MB |
clang++ | 06_biased_02.in | AC | 7 ms | 4 MB |
clang++ | 06_biased_03.in | AC | 7 ms | 4 MB |