結果
| 問題 |
No.1065 電柱 / Pole (Easy)
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2020-05-29 21:44:49 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 547 ms / 2,000 ms |
| コード長 | 2,883 bytes |
| コンパイル時間 | 2,800 ms |
| コンパイル使用メモリ | 206,800 KB |
| 最終ジャッジ日時 | 2025-01-10 16:51:35 |
|
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 * 2 |
| other | AC * 46 |
ソースコード
/*
confirm 0LL and 1LL
confirm cornercases such as 0
confirm times of cin < 10^6
*/
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using P = pair<ll, ll>;
using Pld = pair<ld, ld>;
using Vec = vector<ll>;
using VecP = vector<P>;
using VecB = vector<bool>;
using VecC = vector<char>;
using VecD = vector<ld>;
using VecS = vector<string>;
using Graph = vector<VecP>;
template <typename T>
using Vec1 = vector<T>;
template <typename T>
using Vec2 = vector<Vec1<T> >;
#define REP(i, m, n) for(ll i = (m); (i) < (n); ++(i))
#define REPN(i, m, n) for(ll i = (m); (i) <= (n); ++(i))
#define REPR(i, m, n) for(ll i = (m)-1; (i) >= (n); --(i))
#define REPNR(i, m, n) for(ll i = (m); (i) >= (n); --(i))
#define rep(i, n) REP(i, 0, n)
#define repn(i, n) REPN(i, 1, n)
#define repr(i, n) REPR(i, n, 0)
#define repnr(i, n) REPNR(i, n, 1)
#define all(s) (s).begin(), (s).end()
#define pb push_back
#define fs first
#define sc second
template <typename T>
bool chmax(T &a, const T b){if(a < b){a = b; return true;} return false;}
template <typename T>
bool chmin(T &a, const T b){if(a > b){a = b; return true;} return false;}
template <typename T>
ll pow2(const T n){return (1LL << n);}
template <typename T>
void cosp(const T n){cout << n << ' ';}
void co(void){cout << '\n';}
template <typename T>
void co(const T n){cout << n << '\n';}
template <typename T1, typename T2>
void co(pair<T1, T2> p){cout << p.fs << ' ' << p.sc << '\n';}
template <typename T>
void co(const Vec1<T> &v){for(T i : v) cosp(i); co();}
template <typename T>
void co(initializer_list<T> v){for(T i : v) cosp(i); co();}
template <typename T>
void ce(const T n){cerr << n << endl;}
void sonic(){ios::sync_with_stdio(false); cin.tie(0);}
void setp(const ll n){cout << fixed << setprecision(n);}
constexpr int INF = 1e9+1;
constexpr ll LINF = 1e18+1;
constexpr ll MOD = 1e9+7;
//constexpr ll MOD = 998244353;
constexpr ld EPS = 1e-11;
const ld PI = acos(-1);
vector<vector<pair<ld, ll>>> graph;
vector<ld> dist;
void dijkstra(ll s){
using Pd = pair<ld, ll>;
priority_queue<Pd, vector<Pd>, greater<Pd> > que;
que.push({0, s});
while(!que.empty()){
Pd o = que.top(); que.pop();
if(o.fs >= dist[o.sc]) continue;
dist[o.sc] = o.fs;
for(Pd i : graph[o.sc]) que.push({o.fs+i.fs, i.sc});
}
}
ld getDist(ll p, ll q, VecP &pos){
return sqrt((ld)pow(pos[p].fs - pos[q].fs, 2) + pow(pos[p].sc - pos[q].sc, 2));
}
int main(void){
ll n, m, x, y;
cin >> n >> m >> x >> y;
graph.resize(n);
dist.assign(n, LINF);
--x, --y;
VecP pos(n);
rep(i, n) cin >> pos[i].fs >> pos[i].sc;
rep(i, m){
ll p, q;
cin >> p >> q;
--p, --q;
graph[p].pb({getDist(p, q, pos), q});
graph[q].pb({getDist(p, q, pos), p});
}
dijkstra(x);
setp(10);
co(dist[y]);
return 0;
}