結果

問題 No.1065 電柱 / Pole (Easy)
ユーザー udonmanudonman
提出日時 2020-09-17 10:03:42
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 226 ms / 2,000 ms
コード長 4,163 bytes
コンパイル時間 2,272 ms
コンパイル使用メモリ 212,276 KB
実行使用メモリ 25,048 KB
最終ジャッジ日時 2023-09-04 07:07:15
合計ジャッジ時間 7,869 ms
ジャッジサーバーID
(参考情報)
judge12 / judge15
このコードへのチャレンジ
(要ログイン)

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
4,380 KB
testcase_01 AC 2 ms
4,376 KB
testcase_02 AC 101 ms
13,516 KB
testcase_03 AC 122 ms
24,276 KB
testcase_04 AC 120 ms
23,696 KB
testcase_05 AC 88 ms
24,076 KB
testcase_06 AC 89 ms
23,620 KB
testcase_07 AC 28 ms
8,536 KB
testcase_08 AC 102 ms
23,092 KB
testcase_09 AC 10 ms
5,156 KB
testcase_10 AC 46 ms
12,116 KB
testcase_11 AC 32 ms
9,236 KB
testcase_12 AC 24 ms
8,584 KB
testcase_13 AC 98 ms
16,712 KB
testcase_14 AC 113 ms
18,900 KB
testcase_15 AC 139 ms
20,572 KB
testcase_16 AC 67 ms
13,256 KB
testcase_17 AC 154 ms
22,212 KB
testcase_18 AC 45 ms
10,684 KB
testcase_19 AC 137 ms
20,572 KB
testcase_20 AC 32 ms
8,116 KB
testcase_21 AC 56 ms
12,880 KB
testcase_22 AC 130 ms
19,076 KB
testcase_23 AC 2 ms
4,380 KB
testcase_24 AC 3 ms
4,376 KB
testcase_25 AC 22 ms
8,332 KB
testcase_26 AC 73 ms
13,264 KB
testcase_27 AC 74 ms
14,012 KB
testcase_28 AC 135 ms
21,312 KB
testcase_29 AC 15 ms
6,920 KB
testcase_30 AC 143 ms
21,060 KB
testcase_31 AC 93 ms
16,188 KB
testcase_32 AC 57 ms
11,648 KB
testcase_33 AC 140 ms
25,048 KB
testcase_34 AC 50 ms
10,708 KB
testcase_35 AC 143 ms
21,916 KB
testcase_36 AC 3 ms
4,376 KB
testcase_37 AC 3 ms
4,380 KB
testcase_38 AC 2 ms
4,380 KB
testcase_39 AC 3 ms
4,376 KB
testcase_40 AC 2 ms
4,380 KB
testcase_41 AC 226 ms
23,804 KB
testcase_42 AC 51 ms
9,548 KB
testcase_43 AC 101 ms
13,964 KB
testcase_44 AC 31 ms
7,240 KB
testcase_45 AC 100 ms
13,912 KB
testcase_46 AC 1 ms
4,376 KB
testcase_47 AC 1 ms
4,376 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

#include <bits/stdc++.h>

using namespace std;
using int64 = long long;
const int mod = 1e9 + 7;
// const int mod = 998244353;

const int64 infll = (1LL << 62) - 1;
const int inf = (1 << 30) - 1;

struct IoSetup {
  IoSetup() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    cout << fixed << setprecision(10);
    cerr << fixed << setprecision(10);
  }
} iosetup;


template< typename T1, typename T2 >
ostream &operator<<(ostream &os, const pair< T1, T2 > &p) {
  os << p.first << " " << p.second;
  return os;
}

template< typename T1, typename T2 >
istream &operator>>(istream &is, pair< T1, T2 > &p) {
  is >> p.first >> p.second;
  return is;
}

template< typename T >
ostream &operator<<(ostream &os, const vector< T > &v) {
  for(int i = 0; i < (int) v.size(); i++) {
    os << v[i] << (i + 1 != v.size() ? " " : "");
  }
  return os;
}

template< typename T >
istream &operator>>(istream &is, vector< T > &v) {
  for(T &in : v) is >> in;
  return is;
}

template< typename T1, typename T2 >
inline bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); }

template< typename T1, typename T2 >
inline bool chmin(T1 &a, T2 b) { return a > b && (a = b, true); }

template< typename T = int64 >
vector< T > make_v(size_t a) {
  return vector< T >(a);
}

template< typename T, typename... Ts >
auto make_v(size_t a, Ts... ts) {
  return vector< decltype(make_v< T >(ts...)) >(a, make_v< T >(ts...));
}

template< typename T, typename V >
typename enable_if< is_class< T >::value == 0 >::type fill_v(T &t, const V &v) {
  t = v;
}

template< typename T, typename V >
typename enable_if< is_class< T >::value != 0 >::type fill_v(T &t, const V &v) {
  for(auto &e : t) fill_v(e, v);
}

template< typename F >
struct FixPoint : F {
  FixPoint(F &&f) : F(forward< F >(f)) {}

  template< typename... Args >
  decltype(auto) operator()(Args &&... args) const {
    return F::operator()(*this, forward< Args >(args)...);
  }
};

template< typename F >
inline decltype(auto) MFP(F &&f) {
  return FixPoint< F >{forward< F >(f)};
}

template< typename T = int >
struct Edge {
  int from, to;
  T cost;
  int idx;

  Edge() = default;

  Edge(int from, int to, T cost = 1, int idx = -1) : from(from), to(to), cost(cost), idx(idx) {}

  operator int() const { return to; }
};

template< typename T = int >
struct Graph {
  vector< vector< Edge< T > > > g;
  int es;

  Graph() = default;

  explicit Graph(int n) : g(n), es(0) {}

  size_t size() const {
    return g.size();
  }

  void add_directed_edge(int from, int to, T cost = 1) {
    g[from].emplace_back(from, to, cost, es++);
  }

  void add_edge(int from, int to, T cost = 1) {
    g[from].emplace_back(from, to, cost, es);
    g[to].emplace_back(to, from, cost, es++);
  }

  void read(int M, int padding = -1, bool weighted = false, bool directed = false) {
    for(int i = 0; i < M; i++) {
      int a, b;
      cin >> a >> b;
      a += padding;
      b += padding;
      T c = T(1);
      if(weighted) cin >> c;
      if(directed) add_directed_edge(a, b, c);
      else add_edge(a, b, c);
    }
  }
};

template< typename T = int >
using Edges = vector< Edge< T > >;

/**
 * @brief Dijkstra(単一始点最短路)
 */
template< typename T >
vector< T > dijkstra(const Graph< T > &g, int s) {
  const auto INF = numeric_limits< T >::max();
  vector< T > dist(g.size(), INF);

  using Pi = pair< T, int >;
  priority_queue< Pi, vector< Pi >, greater<> > que;
  dist[s] = 0;
  que.emplace(dist[s], s);
  while(!que.empty()) {
    T cost;
    int idx;
    tie(cost, idx) = que.top();
    que.pop();
    if(dist[idx] < cost) continue;
    for(auto &e : g.g[idx]) {
      auto next_cost = cost + e.cost;
      if(dist[e.to] <= next_cost) continue;
      dist[e.to] = next_cost;
      que.emplace(dist[e.to], e.to);
    }
  }
  return dist;
}

int main() {
  int N, M;
  cin >> N >> M;
  int X, Y;
  cin >> X >> Y;
  --X, --Y;
  vector< int > P(N), Q(N);
  for(int i = 0; i < N; i++) {
    cin >> P[i] >> Q[i];
  }
  Graph< double > g(N);
  while(M--) {
    int a, b;
    cin >> a >> b;
    --a, --b;
    g.add_edge(a, b, hypot(P[a] - P[b], Q[a] - Q[b]));
  }
  cout << dijkstra(g, X)[Y] << "\n";
}
0