結果
| 問題 |
No.807 umg tours
|
| コンテスト | |
| ユーザー |
fooractal
|
| 提出日時 | 2019-03-22 22:06:34 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 340 ms / 4,000 ms |
| コード長 | 3,896 bytes |
| コンパイル時間 | 1,314 ms |
| コンパイル使用メモリ | 109,700 KB |
| 実行使用メモリ | 32,900 KB |
| 最終ジャッジ日時 | 2024-11-23 19:00:20 |
| 合計ジャッジ時間 | 6,451 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 26 |
ソースコード
#include <iostream>
#include <iomanip>
#include <vector>
#include <set>
#include <unordered_set>
#include <map>
#include <unordered_map>
#include <queue>
#include <deque>
#include <stack>
#include <algorithm>
#include <numeric>
#include <string>
#include <sstream>
#include <cmath>
#include <cstring>
#include <assert.h>
#include <utility>
#include <tuple>
#include <array>
#include <bitset>
#include <cstdlib>
using int64 = long long;
template <typename T = int>
struct Range {
struct RangeIterator {
T i, step;
RangeIterator(T i, T step): i{i}, step{step} {}
T& operator*() { return i; }
RangeIterator& operator++() {
i += step;
return *this;
}
bool operator!=(const RangeIterator& rhs) const {
return (step > 0 && i < rhs.i) || (step < 0 && i > rhs.i);
}
};
T start, stop, step;
Range(T start, T stop, T step): start{start}, stop{stop}, step{step} {}
Range(T start, T stop): Range(start, stop, 1) {}
Range(T stop): Range(0, stop, 1) {}
RangeIterator begin() const { return RangeIterator(start, step); }
RangeIterator end() const { return RangeIterator(stop, step); }
};
struct Edge {
using Weight = int64;
int end1_, end2_, from_, to_;
Weight weight_;
Edge() = default;
Edge(int end1, int end2, Weight w):
end1_{end1}, end2_{end2}, from_{end1}, to_{end2}, weight_{w} {}
bool operator<(const Edge& e) const {
return weight_ < e.weight_;
}
};
struct UndirectedGraph {
int num_nodes_;
std::vector<std::vector<Edge>> adjacent_list_;
std::vector<Edge> edges_;
UndirectedGraph() = default;
UndirectedGraph(int num_node): num_nodes_{num_node}, adjacent_list_(num_node) {}
const std::vector<Edge>& operator[](int u) const { return adjacent_list_[u]; }
std::vector<Edge>& operator[](int u) { return adjacent_list_[u]; }
void addEdge(int end1, int end2, Edge::Weight weight) {
adjacent_list_[end1].emplace_back(end1, end2, weight);
adjacent_list_[end2].emplace_back(end2, end1, weight);
edges_.emplace_back(end1, end2, weight);
}
};
int64 cost[100000][2];
void dijkstra(const UndirectedGraph& graph, int start) {
struct State {
int node;
int use_ticket;
int64 cost;
State(int node, int use_ticket, int64 cost): node{node}, use_ticket{use_ticket}, cost{cost} {}
bool operator>(const State& rhs) const {
return cost > rhs.cost;
}
};
constexpr int64 INF = (1LL << 50);
for (int u = 0; u < graph.num_nodes_; u++) {
cost[u][0] = cost[u][1] = INF;
}
std::priority_queue<State, std::vector<State>, std::greater<State>> pque;
cost[start][0] = cost[start][1] = 0;
pque.emplace(start, 0, 0);
while (!pque.empty()) {
State st = pque.top(); pque.pop();
if (cost[st.node][st.use_ticket] < st.cost) continue;
for (const Edge& e : graph[st.node]) {
for (int use_ticket : {0, 1}) {
if (st.use_ticket && use_ticket) continue;
int64 ncost = st.cost + (use_ticket ? 0 : e.weight_);
if (cost[e.to_][st.use_ticket | use_ticket] > ncost) {
cost[e.to_][st.use_ticket | use_ticket] = ncost;
pque.emplace(e.to_, st.use_ticket | use_ticket, ncost);
}
}
}
}
}
int main() {
std::cin.tie(nullptr);
std::ios::sync_with_stdio(false);
int n, m;
std::cin >> n >> m;
UndirectedGraph graph(n);
for (const int i : Range<>(m)) {
int a, b, c;
std::cin >> a >> b >> c;
a--; b--;
graph.addEdge(a, b, c);
}
dijkstra(graph, 0);
for (const int i : Range<>(n)) {
std::cout << cost[i][0] + cost[i][1] << std::endl;
}
return 0;
}
fooractal