結果

問題 No.94 圏外です。(EASY)
ユーザー kei
提出日時 2018-05-02 23:11:48
言語 C++14
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 35 ms / 5,000 ms
コード長 3,724 bytes
コンパイル時間 1,661 ms
コンパイル使用メモリ 171,868 KB
実行使用メモリ 5,376 KB
最終ジャッジ日時 2024-06-28 00:24:43
合計ジャッジ時間 2,942 ms
ジャッジサーバーID
(参考情報)
judge2 / judge3
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ファイルパターン 結果
other AC * 22
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ソースコード

diff #
プレゼンテーションモードにする

#include "bits/stdc++.h"
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
const int INF = 1e9;
const ll LINF = 1e18;
template<class S,class T> ostream& operator << (ostream& out,const pair<S,T>& o){ out << "(" << o.first << "," << o.second << ")"; return out; }
template<class T> ostream& operator << (ostream& out,const vector<T> V){ for(int i = 0; i < V.size(); i++){ out << V[i]; if(i!=V.size()-1) out << " "
    ;} return out; }
template<class T> ostream& operator << (ostream& out,const vector<vector<T> > Mat){ for(int i = 0; i < Mat.size(); i++) { if(i != 0) out << endl; out
    << Mat[i];} return out; }
template<class S,class T> ostream& operator << (ostream& out,const map<S,T> mp){ out << "{ "; for(auto it = mp.begin(); it != mp.end(); it++){ out <<
    it->first << ":" << it->second; if(mp.size()-1 != distance(mp.begin(),it)) out << ", "; } out << " }"; return out; }
/*
<url:https://yukicoder.me/problems/no/94>
============================================================
使
使使
1km
1
1km
10km
(1km10km)
2 N
Xi,Yi (1≤i≤N)
使
2
()
=================================================================
=============================================================
================================================================
*/
struct UnionFind {
vector<int> data;
UnionFind(int size) : data(size, -1) { }
bool unionSet(int x, int y) {
x = root(x); y = root(y);
if (x != y) {
if (data[y] < data[x]) swap(x, y);
data[x] += data[y]; data[y] = x;
}
return x != y;
}
bool findSet(int x, int y) {
return root(x) == root(y);
}
int root(int x) {
return data[x] < 0 ? x : data[x] = root(data[x]);
}
int size(int x) {
return -data[root(x)];
}
};
typedef long double ld;
const ld eps = 1e-9;
ld solve(){
ld res = 0;
int N; cin >> N;
if(N == 0) res = 1;
else res = 2;
vector<complex<ld>> ps(N);
for(int i = 0; i < N;i++){
ld x,y; cin >> x >> y;
ps[i] = complex<ld>(x,y);
}
UnionFind UF(N);
for(int i = 0; i < N;i++){
for(int j = i+1; j < N;j++){
if(abs(ps[i]-ps[j]) < 10 + eps){
UF.unionSet(i, j);
}
}
}
for(int i = 0; i < N;i++){
for(int j = i+1; j < N;j++){
if(UF.findSet(i, j)){
res = max(res,abs(ps[i]-ps[j])+2);
}
}
}
return res;
}
int main(void) {
cin.tie(0); ios_base::sync_with_stdio(false);
cout << fixed << setprecision(12) << solve() << endl;
return 0;
}
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