結果
問題 | No.2712 Play more! |
ユーザー | commy |
提出日時 | 2024-11-01 21:19:44 |
言語 | C++23(gcc13) (gcc 13.2.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 113 ms / 2,000 ms |
コード長 | 7,026 bytes |
コンパイル時間 | 1,961 ms |
コンパイル使用メモリ | 136,624 KB |
実行使用メモリ | 6,820 KB |
最終ジャッジ日時 | 2024-11-01 21:19:48 |
合計ジャッジ時間 | 4,098 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
6,820 KB |
testcase_01 | AC | 2 ms
6,816 KB |
testcase_02 | AC | 2 ms
6,820 KB |
testcase_03 | AC | 2 ms
6,816 KB |
testcase_04 | AC | 1 ms
6,820 KB |
testcase_05 | AC | 2 ms
6,816 KB |
testcase_06 | AC | 2 ms
6,820 KB |
testcase_07 | AC | 42 ms
6,820 KB |
testcase_08 | AC | 41 ms
6,820 KB |
testcase_09 | AC | 43 ms
6,816 KB |
testcase_10 | AC | 2 ms
6,816 KB |
testcase_11 | AC | 17 ms
6,816 KB |
testcase_12 | AC | 82 ms
6,820 KB |
testcase_13 | AC | 20 ms
6,820 KB |
testcase_14 | AC | 71 ms
6,816 KB |
testcase_15 | AC | 113 ms
6,820 KB |
testcase_16 | AC | 9 ms
6,820 KB |
testcase_17 | AC | 4 ms
6,816 KB |
testcase_18 | AC | 8 ms
6,820 KB |
testcase_19 | AC | 5 ms
6,816 KB |
testcase_20 | AC | 31 ms
6,816 KB |
testcase_21 | AC | 13 ms
6,816 KB |
testcase_22 | AC | 70 ms
6,820 KB |
testcase_23 | AC | 6 ms
6,820 KB |
testcase_24 | AC | 12 ms
6,820 KB |
testcase_25 | AC | 4 ms
6,816 KB |
testcase_26 | AC | 12 ms
6,816 KB |
testcase_27 | AC | 21 ms
6,816 KB |
testcase_28 | AC | 30 ms
6,816 KB |
testcase_29 | AC | 13 ms
6,820 KB |
testcase_30 | AC | 113 ms
6,816 KB |
testcase_31 | AC | 51 ms
6,816 KB |
testcase_32 | AC | 49 ms
6,816 KB |
testcase_33 | AC | 2 ms
6,816 KB |
testcase_34 | AC | 2 ms
6,816 KB |
testcase_35 | AC | 2 ms
6,816 KB |
ソースコード
#include <algorithm> #include <iostream> #include <numeric> #include <string> #include <tuple> #include <utility> #include <vector> #include <limits> #define rep(i, a, b) for (int i = int(a); i < int(b); i++) using namespace std; using ll = long long int; // NOLINT using P = pair<ll, ll>; // clang-format off #ifdef _DEBUG_ #define dump(...) do{ cerr << __LINE__ << ":\t" << #__VA_ARGS__ << " = "; debug_print(__VA_ARGS__); } while(false) template<typename T, typename... Ts> void debug_print(const T &t, const Ts &...ts) { cerr << t; ((cerr << ", " << ts), ...); cerr << endl; } #else #define dump(...) do{ } while(false) #endif template<typename T> vector<T> make_v(size_t a, T b) { return vector<T>(a, b); } template<typename... Ts> auto make_v(size_t a, Ts... ts) { return vector<decltype(make_v(ts...))>(a, make_v(ts...)); } template<typename T> bool chmin(T &a, const T& b) { if (a > b) {a = b; return true; } return false; } template<typename T> bool chmax(T &a, const T& b) { if (a < b) {a = b; return true; } return false; } template<typename T, typename... Ts> void print(const T& t, const Ts&... ts) { cout << t; ((cout << ' ' << ts), ...); cout << '\n'; } constexpr static struct PositiveInfinity { template<typename T> constexpr operator T() const { return numeric_limits<T>::max() / 2; } constexpr auto operator-() const; } inf; // NOLINT constexpr static struct NegativeInfinity { template<typename T> constexpr operator T() const { return numeric_limits<T>::lowest() / 2; } constexpr auto operator-() const; } NegativeInfinityVal; constexpr auto PositiveInfinity::operator-() const { return NegativeInfinityVal; } constexpr auto NegativeInfinity::operator-() const { return inf; } // clang-format on #include <limits> #include <cmath> #include <queue> #include <deque> enum class CostType { NoEdge, One, ZeroOne, Plus, PlusMinus, }; template<typename Cost = long long, typename Vertex = int> class Graph { using Edge = pair<Cost, Vertex>; using ShortestInfo = pair<vector<Cost>, vector<Vertex>>; vector<vector<Edge>> g; CostType cost_type; ShortestInfo no_edge(Vertex s) { auto costs = vector<Cost>(g.size(), Inf); auto prev = vector<Vertex>(g.size(), None); costs[s] = 0; return make_pair(std::move(costs), std::move(prev)); } ShortestInfo bfs01(Vertex s) { auto [costs, prev] = no_edge(s); deque<Edge> deq; deq.emplace_back(0, s); while (deq.size()) { auto [c, v] = deq.front(); deq.pop_front(); if (costs[v] < c) continue; for (auto &&[nc, nv] : adjacent(v)) { if (costs[nv] > c + nc) { costs[nv] = c + nc; if (nc == 0) { deq.emplace_front(c, nv); } else { deq.emplace_back(c + 1, nv); } prev[nv] = v; } } } return make_pair(std::move(costs), std::move(prev)); } ShortestInfo bfs(Vertex s) { auto [costs, prev] = no_edge(s); queue<Edge> que; que.emplace(0, s); while (que.size()) { auto [c, v] = que.front(); que.pop(); if (costs[v] < c) continue; for (auto &&[nc, nv] : adjacent(v)) { if (costs[nv] > c + nc) { costs[nv] = c + nc; que.emplace(c + nc, nv); prev[nv] = v; } } } return make_pair(std::move(costs), std::move(prev)); } ShortestInfo dijkstra(Vertex s) { auto [costs, prev] = no_edge(s); priority_queue<Edge, vector<Edge>, greater<Edge>> pq; pq.emplace(0, s); while (pq.size()) { auto [c, v] = pq.top(); pq.pop(); if (costs[v] < c) continue; for (auto &&[nc, nv] : adjacent(v)) { if (costs[nv] > c + nc) { costs[nv] = c + nc; pq.emplace(c + nc, nv); prev[nv] = v; } } } return make_pair(std::move(costs), std::move(prev)); } ShortestInfo bellman_ford(Vertex s) { auto [costs, prev] = no_edge(s); for (size_t i = 0, n = g.size(); i < 2 * n; i++) { for (Vertex v = 0; v < static_cast<Vertex>(n); v++) { if (costs[v] == Inf) continue; for (auto &&[cost, nv] : adjacent(v)) { if (costs[v] == -Inf || costs[v] + cost < costs[nv]) { if (i >= n) { costs[nv] = -Inf; } else { costs[nv] = costs[v] + cost; } prev[nv] = v; } } } } return make_pair(std::move(costs), std::move(prev)); } void update_cost_type(Cost cost) { CostType ct = CostType::NoEdge; if (signbit(cost)) { ct = CostType::PlusMinus; } else if (cost != 0 && cost != 1) { ct = CostType::Plus; } else if (cost == 0) { ct = CostType::ZeroOne; } else if (cost == 1) { ct = CostType::One; } cost_type = static_cast<CostType>(max(static_cast<int>(ct), static_cast<int>(cost_type))); } public: Graph(size_t n) : g(n), cost_type(CostType::NoEdge) {} void add_edge(Vertex s, Vertex t, Cost cost) { update_cost_type(cost); g[s].emplace_back(cost, t); } const vector<Edge> &adjacent(Vertex v) const { return g[v]; } size_t size() const { return g.size(); } CostType get_cost_type() const { return cost_type; } ShortestInfo shortest(Vertex s) { switch (cost_type) { case CostType::ZeroOne: return bfs01(s); case CostType::One: return bfs(s); case CostType::Plus: return dijkstra(s); case CostType::PlusMinus: return bellman_ford(s); case CostType::NoEdge: return no_edge(s); } __builtin_unreachable(); } constexpr static Cost Inf = numeric_limits<Cost>::max(); constexpr static Vertex None = -1; }; int main() { cin.tie(nullptr); ios::sync_with_stdio(false); int n, m; cin >> n >> m; vector<int> tm(n); rep(i, 0, n) { cin >> tm[i]; } Graph<ll> g(n); rep(i, 0, m) { int a, b, c; cin >> a >> b >> c; a--; b--; g.add_edge(a, b, c - tm[b]); } auto [cost, prev] = g.shortest(0); ll ans = cost[n - 1]; if (ans == -g.Inf) { print("inf"); } else { print(-ans + tm[0]); } return 0; }