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_2_A
#include "../../template/template.hpp"
#include "../../graph/mst/prim.hpp"
int main() {
int V, E;
cin >> V >> E;
Graph<> g(V);
g.read(E, 0, true);
cout << prim(g).cost << "\n";
}
#line 1 "test/verify/aoj-grl-2-a.test.cpp"
// competitive-verifier: PROBLEM http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=GRL_2_A
#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-2-a.test.cpp"
#line 2 "graph/mst/prim.hpp"
#line 2 "graph/graph-template.hpp"
/**
* @brief Graph Template(グラフテンプレート)
*/
template <typename T = int>
struct Edge {
int from, to;
T cost;
int idx;
Edge() = default;
Edge(int from, int to, T cost = 1, int idx = -1)
: from(from), to(to), cost(cost), idx(idx) {}
operator int() const { return to; }
};
template <typename T = int>
struct Graph {
vector<vector<Edge<T> > > g;
int es;
Graph() = default;
explicit Graph(int n) : g(n), es(0) {}
size_t size() const { return g.size(); }
void add_directed_edge(int from, int to, T cost = 1) {
g[from].emplace_back(from, to, cost, es++);
}
void add_edge(int from, int to, T cost = 1) {
g[from].emplace_back(from, to, cost, es);
g[to].emplace_back(to, from, cost, es++);
}
void read(int M, int padding = -1, bool weighted = false,
bool directed = false) {
for (int i = 0; i < M; i++) {
int a, b;
cin >> a >> b;
a += padding;
b += padding;
T c = T(1);
if (weighted) cin >> c;
if (directed)
add_directed_edge(a, b, c);
else
add_edge(a, b, c);
}
}
inline vector<Edge<T> > &operator[](const int &k) { return g[k]; }
inline const vector<Edge<T> > &operator[](const int &k) const { return g[k]; }
};
template <typename T = int>
using Edges = vector<Edge<T> >;
#line 4 "graph/mst/prim.hpp"
/**
* @brief Prim(最小全域木)
*
*/
template <typename T>
struct MinimumSpanningTree {
T cost;
Edges<T> edges;
};
template <typename T>
MinimumSpanningTree<T> prim(const Graph<T> &g) {
T total = T();
vector<int> used(g.size());
vector<Edge<T> *> dist(g.size());
using pi = pair<T, int>;
priority_queue<pi, vector<pi>, greater<> > que;
que.emplace(T(), 0);
Edges<T> edges;
while (!que.empty()) {
auto p = que.top();
que.pop();
if (used[p.second]) continue;
used[p.second] = true;
total += p.first;
if (dist[p.second]) edges.emplace_back(*dist[p.second]);
for (auto &e : g[p.second]) {
if (used[e.to] || (dist[e.to] && dist[e.to]->cost <= e.cost)) continue;
que.emplace(e.cost, e.to);
}
}
return {total, edges};
}
#line 6 "test/verify/aoj-grl-2-a.test.cpp"
int main() {
int V, E;
cin >> V >> E;
Graph<> g(V);
g.read(E, 0, true);
cout << prim(g).cost << "\n";
}
Env | Name | Status | Elapsed | Memory |
---|---|---|---|---|
g++ | 00_sample1.in | AC | 5 ms | 4 MB |
g++ | 00_sample2.in | AC | 5 ms | 4 MB |
g++ | critical1.in | AC | 5 ms | 4 MB |
g++ | critical2.in | AC | 8 ms | 4 MB |
g++ | critical3.in | AC | 25 ms | 8 MB |
g++ | out1.in | AC | 5 ms | 4 MB |
g++ | out10.in | AC | 37 ms | 10 MB |
g++ | out11.in | AC | 14 ms | 6 MB |
g++ | out12.in | AC | 20 ms | 7 MB |
g++ | out13.in | AC | 17 ms | 6 MB |
g++ | out14.in | AC | 20 ms | 6 MB |
g++ | out15.in | AC | 17 ms | 6 MB |
g++ | out2.in | AC | 6 ms | 4 MB |
g++ | out3.in | AC | 5 ms | 4 MB |
g++ | out4.in | AC | 6 ms | 4 MB |
g++ | out5.in | AC | 6 ms | 4 MB |
g++ | out6.in | AC | 39 ms | 10 MB |
g++ | out7.in | AC | 39 ms | 10 MB |
g++ | out8.in | AC | 39 ms | 10 MB |
g++ | out9.in | AC | 39 ms | 10 MB |
clang++ | 00_sample1.in | AC | 5 ms | 4 MB |
clang++ | 00_sample2.in | AC | 5 ms | 4 MB |
clang++ | critical1.in | AC | 5 ms | 4 MB |
clang++ | critical2.in | AC | 8 ms | 4 MB |
clang++ | critical3.in | AC | 27 ms | 8 MB |
clang++ | out1.in | AC | 5 ms | 4 MB |
clang++ | out10.in | AC | 37 ms | 10 MB |
clang++ | out11.in | AC | 14 ms | 6 MB |
clang++ | out12.in | AC | 20 ms | 7 MB |
clang++ | out13.in | AC | 17 ms | 6 MB |
clang++ | out14.in | AC | 20 ms | 6 MB |
clang++ | out15.in | AC | 16 ms | 6 MB |
clang++ | out2.in | AC | 5 ms | 4 MB |
clang++ | out3.in | AC | 5 ms | 4 MB |
clang++ | out4.in | AC | 5 ms | 4 MB |
clang++ | out5.in | AC | 5 ms | 4 MB |
clang++ | out6.in | AC | 36 ms | 10 MB |
clang++ | out7.in | AC | 37 ms | 10 MB |
clang++ | out8.in | AC | 37 ms | 10 MB |
clang++ | out9.in | AC | 38 ms | 10 MB |