結果
| 問題 |
No.1065 電柱 / Pole (Easy)
|
| コンテスト | |
| ユーザー |
Imperi_Night
|
| 提出日時 | 2020-05-29 21:44:27 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 443 ms / 2,000 ms |
| コード長 | 4,345 bytes |
| コンパイル時間 | 1,977 ms |
| コンパイル使用メモリ | 143,752 KB |
| 最終ジャッジ日時 | 2025-01-10 16:51:08 |
|
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
#include <algorithm>
#include <array>
#include <bitset>
#include <cassert>
#include <cctype>
#include <cstdint>
#include <cstdlib>
#include <cmath>
#include <complex>
#include <chrono>
#include <deque>
#include <functional>
#include <iomanip>
#include <iostream>
#include <map>
#include <memory>
#include <numeric>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <type_traits>
#include <unordered_map>
#include <vector>
#include <random>
#include <utility>
#include <limits>
#include <list>
/* template start */
#define rep(i, a, b) for (long long i = (a); (i) < (b); (i)++)
#define all(i) i.begin(), i.end()
#ifdef LOCAL
#define debug(...) std::cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#else
#define debug(...)
#endif
void debug_out(){std::cerr<<std::endl;}
template<typename Head,typename... Tail>
void debug_out(Head h,Tail... t){
std::cerr<<" "<<h;
if(sizeof...(t)>0)std::cout<<" :";
debug_out(t...);
}
template <typename T1, typename T2>
std::ostream& operator<<(std::ostream& os, std::pair<T1, T2> pa) {
return os << pa.first << " " << pa.second;
}
template <typename T>
std::ostream& operator<<(std::ostream& os, std::vector<T> vec) {
for (std::size_t i = 0; i < vec.size(); i++)os << vec[i] << (i + 1 == vec.size() ? "" : " ");
return os;
}
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 Num>
constexpr Num mypow(Num a, long long b) {
if(b==0)return 1;
if (a==0)return 0;
Num x = 1;
while (b > 0) {
if(b & 1)x*=a;
a*=a;
b >>= 1;
}
return x;
}
template <std::uint_fast64_t Modulus> class modint {
using u64 = std::uint_fast64_t;
public:
u64 a;
constexpr modint(const u64 x = 0) noexcept : a(x % Modulus) {}
constexpr u64 &value() noexcept { return a; }
constexpr const u64 &value() const noexcept { return a; }
constexpr bool operator==(const modint rhs) const noexcept {return a==rhs.a;}
constexpr bool operator!=(const modint rhs) const noexcept {return !(*this==rhs);}
constexpr modint operator+(const modint rhs) const noexcept {
return modint(*this) += rhs;
}
constexpr modint operator-(const modint rhs) const noexcept {
return modint(*this) -= rhs;
}
constexpr modint operator*(const modint rhs) const noexcept {
return modint(*this) *= rhs;
}
constexpr modint operator/(const modint rhs) const noexcept {
return modint(*this) /= rhs;
}
constexpr modint &operator+=(const modint rhs) noexcept {
a += rhs.a;
if (a >= Modulus) {
a -= Modulus;
}
return *this;
}
constexpr modint &operator-=(const modint rhs) noexcept {
if (a < rhs.a) {
a += Modulus;
}
a -= rhs.a;
return *this;
}
constexpr modint &operator*=(const modint rhs) noexcept {
a = a * rhs.a % Modulus;
return *this;
}
constexpr modint &operator/=(modint rhs) noexcept {
u64 exp = Modulus - 2;
while (exp) {
if (exp % 2) {
*this *= rhs;
}
rhs *= rhs;
exp /= 2;
}
return *this;
}
};
/* template end */
using ll = long long;
int main() {
std::cin.tie(nullptr);
std::ios::sync_with_stdio(false);
using Edge=std::pair<long double,ll>;
ll n,m;
std::cin>>n>>m;
ll x,y;
std::cin>>x>>y;
x--;y--;
using P=std::pair<long double,long double>;
std::vector<P> points(n);
for(auto&& e:points)std::cin>>e.first>>e.second;
std::vector<std::vector<std::pair<ll,long double>>> graph(n);
rep(i,0,m){
ll p,q;
std::cin>>p>>q;
p--;q--;
long double len=std::hypot(points[p].first-points[q].first,points[p].second-points[q].second);
graph[p].emplace_back(q,len);
graph[q].emplace_back(p,len);
}
std::priority_queue<Edge,std::vector<Edge>,std::greater<Edge>> que;
constexpr long double INF=1e18;
std::vector<long double> d(n,INF);
d[x]=0;
que.emplace(0,x);
while(!que.empty()){
auto now=que.top();que.pop();
ll v=now.second;
if(d[v]<now.first)continue;
for(const auto& e:graph[v]){
if(d[e.first]>d[v]+e.second){
d[e.first]=d[v]+e.second;
que.emplace(d[e.first],e.first);
}
}
}
std::cout<<std::setprecision(10)<<std::fixed<<d[y]<<"\n";
return 0;
}
Imperi_Night