結果
問題 | No.20 砂漠のオアシス |
ユーザー | kyuna |
提出日時 | 2019-07-29 22:33:02 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
CE
(最新)
AC
(最初)
|
実行時間 | - |
コード長 | 2,095 bytes |
コンパイル時間 | 634 ms |
コンパイル使用メモリ | 74,580 KB |
最終ジャッジ日時 | 2024-11-14 21:31:08 |
合計ジャッジ時間 | 1,094 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: In function 'std::vector<_Tp> dijkstra(WeightedGraph<T>&, int)': main.cpp:19:19: error: 'numeric_limits' was not declared in this scope 19 | const T INF = numeric_limits<T>::max(); | ^~~~~~~~~~~~~~ main.cpp:19:35: error: expected primary-expression before '>' token 19 | const T INF = numeric_limits<T>::max(); | ^ main.cpp:19:41: error: no matching function for call to 'max()' 19 | 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:19:41: note: candidate expects 2 arguments, 0 provided 19 | 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:19:41: note: candidate expects 3 arguments, 0 provided 19 | 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/Ce
ソースコード
#include <algorithm> #include <iostream> #include <vector> #include <queue> #include <tuple> 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> vector<T> dijkstra(const WeightedGraph<T> &g, int s) { const T INF = numeric_limits<T>::max(); vector<T> dist(g.size(), INF); vector<int> prev(g.size(), -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) continue; dist[v] = dist[u] + nc; prev[v] = u; que.emplace(dist[v], v); } } return dist; } int main() { int n, v, oi, oj; cin >> n >> v >> oj >> oi; oi--, oj--; WeightedGraph<int> g(n * n); auto idx = [&](int i, int j) { return i * n + j; }; auto out_field = [&](int i, int j) { return i < 0 || i >= n || j < 0 || j >= n; }; int dij[] = {0, 1, 0, -1, 0}; for (int i = 0; i < n; i++) for (int j = 0; j < n; j++) { int cost; cin >> cost; for (int k = 0; k < 4; k++) { int ni = i + dij[k], nj = j + dij[k + 1]; if (out_field(ni, nj)) continue; g[idx(ni, nj)].emplace_back(idx(i, j), cost); } } auto dist_s = dijkstra(g, idx(0, 0)); bool ok = dist_s[idx(n - 1, n - 1)] < v; if (oi != -1 && oj != -1) { auto dist_o = dijkstra(g, idx(oi, oj)); ok |= dist_o[idx(n - 1, n - 1)] < 2 * (v - dist_s[idx(oi, oj)]); } if (ok) cout << "YES" << endl; else cout << "NO" << endl; return 0; }