結果
| 問題 |
No.160 最短経路のうち辞書順最小
|
| コンテスト | |
| ユーザー |
kyuna
|
| 提出日時 | 2019-07-28 02:30:52 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
CE
(最新)
AC
(最初)
|
| 実行時間 | - |
| コード長 | 2,635 bytes |
| コンパイル時間 | 695 ms |
| コンパイル使用メモリ | 77,732 KB |
| 最終ジャッジ日時 | 2024-11-14 21:31:09 |
| 合計ジャッジ時間 | 1,066 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
(要ログイン)
コンパイルエラー時のメッセージ・ソースコードは、提出者また管理者しか表示できないようにしております。(リジャッジ後のコンパイルエラーは公開されます)
ただし、clay言語の場合は開発者のデバッグのため、公開されます。
ただし、clay言語の場合は開発者のデバッグのため、公開されます。
コンパイルメッセージ
main.cpp:20:19: error: 'numeric_limits' was not declared in this scope
20 | const T INF = numeric_limits<T>::max();
| ^~~~~~~~~~~~~~
main.cpp:20:35: error: expected primary-expression before '>' token
20 | const T INF = numeric_limits<T>::max();
| ^
main.cpp:20:41: error: no matching function for call to 'max()'
20 | const T INF = numeric_limits<T>::max();
| ~~~~~^~
In file included from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.3.0/include/c++/12/algorithm:60,
from main.cpp:1:
/home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.3.0/include/c++/12/bits/stl_algobase.h:254:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
254 | max(const _Tp& __a, const _Tp& __b)
| ^~~
/home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.3.0/include/c++/12/bits/stl_algobase.h:254:5: note: template argument deduction/substitution failed:
main.cpp:20:41: note: candidate expects 2 arguments, 0 provided
20 | const T INF = numeric_limits<T>::max();
| ~~~~~^~
/home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.3.0/include/c++/12/bits/stl_algobase.h:300:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
300 | max(const _Tp& __a, const _Tp& __b, _Compare __comp)
| ^~~
/home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.3.0/include/c++/12/bits/stl_algobase.h:300:5: note: template argument deduction/substitution failed:
main.cpp:20:41: note: candidate expects 3 arguments, 0 provided
20 | const T INF = numeric_limits<T>::max();
| ~~~~~^~
In file included from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.3.0/include/c++/12/algorithm:61:
/home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.3.0/include/c++/12/bits/stl_algo.h:5746:5: note: candidate:
ソースコード
#include <algorithm>
#include <iostream>
#include <vector>
#include <queue>
#include <tuple>
#include <ostream>
using namespace std;
template <typename T>
struct Edge { int src, dst; T cost;
Edge(int dst, T cost) : src(-1), dst(dst), cost(cost) { }
Edge(int src, int dst, T cost) : src(src), dst(dst), cost(cost) { }
};
template <typename T> using Edges = vector<Edge<T>>;
template <typename T> using WeightedGraph = vector<Edges<T>>;
template <typename T> using Matrix = vector<vector<T>>;
template <typename T>
struct Dijkstra {
const T INF = numeric_limits<T>::max();
const WeightedGraph<T> &g;
int V, s; vector<T> dist; vector<int> prev; Matrix<T> mat;
Dijkstra(const WeightedGraph<T> &g, int s) : g(g), V(g.size()), s(s) {
mat.assign(V, vector<int>(V)); // MLE に注意
for (int u = 0; u < V; u++) for (auto e: g[u]) mat[u][e.dst] = e.cost;
dist.assign(V, INF); prev.assign(V, -1);
using Pi = pair<T, int>;
priority_queue<Pi, vector<Pi>, greater<Pi>> que;
dist[s] = 0; que.emplace(dist[s], s);
while (!que.empty()) {
T cost; int u; tie(cost, u) = que.top(); que.pop();
if (dist[u] < cost) continue;
for (auto &e: g[u]) {
int v = e.dst; T nc = e.cost;
if (dist[v] > dist[u] + nc) {
dist[v] = dist[u] + nc;
prev[v] = u;
que.emplace(dist[v], v);
} else if (dist[v] == dist[u] + nc) {
prev[v] = min(prev[v], u);
}
}
}
}
vector<int> build_path(int t) {
vector<int> path;
for (int u = t; u >= 0; u = prev[u]) path.emplace_back(u);
//reverse(path.begin(), path.end());
return path;
}
void dump_path(int t) { dump_path(build_path(t)); }
void dump_path(const vector<int> &path) { int t = path.back();
cerr << s << " -> " << t << " (d = ";
if (dist[t] == INF) cerr << "∞): "; else cerr << dist[t] << "): ";
for (auto it = path.begin(); it != path.end() - 1; it++)
cerr << *it << " -[" << mat[*it][*(it + 1)] << "]-> ";
if (s == path.front()) cerr << t; cerr << endl;
}
};
int main() {
int N, M, S, G; cin >> N >> M >> S >> G;
WeightedGraph<int> g(N);
while (M--) {
int a, b, c; cin >> a >> b >> c;
g[a].emplace_back(b, c);
g[b].emplace_back(a, c);
}
Dijkstra<int> sssp(g, G);
int i = 0;
for (int x: sssp.build_path(S)) {
if (i++) cout << " "; cout << x;
}
cout << endl;
return 0;
}
kyuna