結果
問題 | No.1069 電柱 / Pole (Hard) |
ユーザー |
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提出日時 | 2020-05-29 22:11:31 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 1,419 ms / 2,000 ms |
コード長 | 2,485 bytes |
コンパイル時間 | 2,264 ms |
コンパイル使用メモリ | 190,700 KB |
実行使用メモリ | 6,996 KB |
最終ジャッジ日時 | 2024-07-23 15:05:45 |
合計ジャッジ時間 | 25,377 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 79 |
ソースコード
#include <bits/stdc++.h>int ri() {int n;scanf("%d", &n);return n;}template<typename T> using pqueue_inv = std::priority_queue<T, std::vector<T>, std::greater<T> >;const double DINF = 1000000000;int main() {int n = ri();int m = ri();int k = ri();int x = ri() - 1, y = ri() - 1;std::pair<int, int> pts[n];for (auto &i : pts) i.first = ri(), i.second = ri();auto calc_dist = [&] (int i, int j) {return std::hypot(pts[i].first - pts[j].first, pts[i].second - pts[j].second);};std::vector<std::pair<int, double> > hen[n];for (int i = 0; i < m; i++) {int x = ri() - 1;int y = ri() - 1;hen[x].push_back({y, calc_dist(x, y)});hen[y].push_back({x, calc_dist(x, y)});}struct Payload {double cur_cost;int pos;std::vector<bool> used;bool operator > (const Payload &rhs) const {return cur_cost > rhs.cur_cost;}bool operator < (const Payload &rhs) const {return cur_cost < rhs.cur_cost;}};auto dijkstra = [&] (int s, int t, const std::vector<bool> &used) {std::vector<double> dist(n, DINF);pqueue_inv<std::pair<double, int> > que;que.push({dist[s] = 0, s});while (que.size()) {auto j = que.top();que.pop();if (j.second == t) return dist[t];if (j.first != dist[j.second]) continue;for (auto k : hen[j.second]) {if (used[k.first]) continue;if (dist[k.first] > j.first + k.second) que.push({dist[k.first] = j.first + k.second, k.first});}}return dist[t];};if (dijkstra(x, y, std::vector<bool>(n)) == DINF) {for (int i = 0; i < k; i++) puts("-1");return 0;}pqueue_inv<std::pair<double, Payload> > que;std::vector<std::pair<double, Payload> > all[n];std::vector<bool> init_(n);init_[x] = true;que.push({dijkstra(x, y, std::vector<bool>(n)), {0, x, init_}});while (que.size()) {auto i = que.top();que.pop();double cur_cost = i.second.cur_cost;int x = i.second.pos;auto &used = i.second.used;if ((int) all[x].size() >= k) continue;all[x].push_back(i);for (auto j : hen[x]) {if (used[j.first]) continue;used[j.first] = true;double cost = dijkstra(j.first, y, used);if (cost == DINF) continue;double new_estimated = cost + cur_cost + j.second;que.push({new_estimated, {cur_cost + j.second, j.first, used}});// bfsused[j.first] = false;}}for (int i = 0; i < k; i++) {if (i < (int) all[y].size()) {printf("%.11f\n", all[y][i].first);} else puts("-1");}return 0;}