結果
| 問題 |
No.96 圏外です。
|
| コンテスト | |
| ユーザー |
Astral__
|
| 提出日時 | 2023-08-09 04:21:21 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 11,406 bytes |
| コンパイル時間 | 3,131 ms |
| コンパイル使用メモリ | 230,588 KB |
| 最終ジャッジ日時 | 2025-02-16 00:16:03 |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 27 WA * 1 |
ソースコード
#include<bits/stdc++.h>
#define PPque priority_queue<tuple<ll, ll, ll>, vector<tuple<ll, ll, ll>>, greater<tuple<ll, ll, ll>>>
#define Pque priority_queue<pair<ll, ll>, vector<pair<ll, ll>>, greater<pair<ll, ll>>>
#define pque priority_queue<int, vector<int>, greater<int>>
#define umap unordered_map
#define uset unordered_set
#define rep(i, s, f) for(ll i = s; i <= f; i++)
#define per(i, s, f) for(ll i = s; i >= f; i--)
#define all0(x) (x).begin() ,(x).end()
#define all(x) (x).begin() + 1, (x).end()
#define vvvi vector<vector<vector<int>>>
#define vvvl vector<vector<vector<ll>>>
#define vvvc vector<vector<vector<char>>>
#define vvvd vector<vector<vector<double>>>
#define vvi vector<vector<int>>
#define vvl vector<vector<ll>>
#define vvs vector<vector<string>>
#define vvc vector<vector<char>>
#define vvp vector<vector<pair<ll, ll>>>
#define vvb vector<vector<bool>>
#define vvd vector<vector<double>>
#define vp vector<pair<ll, ll>>
#define vi vector<int>
#define vl vector<ll>
#define vs vector<string>
#define vc vector<char>
#define vb vector<bool>
#define vd vector<double>
#define P pair<ll, ll>
#define TU tuple<ll, ll, ll>
#define rrr(l, r) mt()%(r-1)+l+1
#define ENDL '\n'
#define ull unsigned long long
#define debug(a, s) rep(i, s, a.size()-1) {cout << a.at(i) << " ";}cout << endl;
#define Debug(a, s) rep(i, s, a.size()-1) {rep(j, s, a.at(i).size()-1) {cout << a.at(i).at(j) << " ";}cout << endl;}
typedef long long ll;
using namespace std;
////////////////////////////////////////////////////////////////////////////////////////////////////////////
//これが本当の組み込み関数ってね(笑)
template <typename T>
T or_less(vector<T> &A, T x) { //x以下で最大要素の添字 前提: sort済み 存在しない: -1
return distance(A.begin(), upper_bound(A.begin(), A.end(), x)-1);
}
template <typename T>
T under(vector<T> &A, T x) { //x未満の最大要素の添字 前提: sort済み 存在しない: -1
return distance(A.begin(), lower_bound(A.begin(), A.end(), x)-1);
}
template <typename T>
T or_more(vector<T> &A, T x) { //x以上で最小要素の添字 前提: sort済み 存在しない: N . //distanceのA.beginは添字を出すために常にA.begin() NG: A.begin() + 1
return distance(A.begin(), lower_bound(A.begin(), A.end(), x));
}
template <typename T>
T over(vector<T> &A, T x) { //xより大きい最小要素の添字前提: sort済み 存在しない: N
return distance(A.begin(), upper_bound(A.begin(), A.end(), x));
}
void compress(vector<ll> &A) {//小さい順に順位、大きい順にしたいならreverseはNG最後に変換
vector<ll> temp = A;
sort(temp.begin()+1, temp.end());
for (int i = 1; i <= int(A.size()-1); i++) {
A.at(i) = distance(temp.begin(), lower_bound(temp.begin()+1, temp.end(), A.at(i)));
}
}
ll LIS1(vl &A) {//at(0)は番兵、広義単調増加
ll N = A.size()-1;
vl L(N+1, 1001001001001001001LL);
L.at(0) = -1 * 1001001001001001001LL;
ll ans = 0;
rep(i, 1, N) {
ll idx = over<ll>(L, A.at(i));
L.at(idx) = A.at(i);
ans = max(ans, idx);
}
return ans;
}
ll LIS2(vl &A) {//狭義単調増加
ll N = A.size() - 1;
vl L(N+1, 1001001001001001001LL);
L.at(0) = -1 * 1001001001001001001LL;
ll ans = 0;
rep(i, 1, N) {
ll idx = or_more<ll>(L, A.at(i));
L.at(idx) = A.at(i);
ans = max(ans, idx);
}
return ans;
}
//////////////////////////////////////////////////////////////////////
//数学系
///////////////////////////////////////////////////////////////////////
ll POWER(ll a, ll b, ll mod) {
a %= mod;
vector<ll> pow (61);
pow.at(0) = a;
bitset<60> bina(b);
ll answer = 1;
for (int i = 1; i <= 60; i++) {
pow.at(i) = pow.at(i-1) * pow.at(i-1) % mod;
if (bina.test(i-1)) {
answer = (answer*pow.at(i-1)) % mod;
}
}
return answer;
}
ll Div(ll a, ll b, ll mod) {
return a * POWER(b, mod-2, mod) % mod;
}
ll round(ll x, ll i) {
return ll(x + 5 * pow(10, i-1))/ll(pow(10, i)) * ll(pow(10, i));
}
template <typename T> //約分
void normalize(T &mol, T &deno) {
T mol_temp = abs(mol);
T deno_temp = abs(deno);
T GCD = gcd(mol_temp, deno_temp);
mol /= GCD;
deno /= GCD;
}
vvl mat_mul(vvl &a, vvl &b, ll mod) {//0-indexed && 正方行列
ll n = a.size();
vvl res(n , vl(n, 0));
rep(i, 0, n-1) {
rep(j, 0, n-1) {
rep(k, 0, n-1) {
res.at(i).at(j) += a.at(i).at(k) * b.at(k).at(j);
res.at(i).at(j) %= mod;
}
}
}
return res;
}
vvl mat_pow(vvl &a, ll b, ll mod) {//0-indexed && 正方行列
bitset<60> bina(b);
vvl power = a;
int N = a.size();
vvl res(N, vl(N, 0));
rep(i, 0, N-1) {
res.at(i).at(i) = 1;
}
rep(i, 1, 60) {
if (bina.test(i-1)) {
res = mat_mul(res, power, mod);
}
power = mat_mul(power, power, mod);
}
return res;
}
vvl comb(ll n, ll mod) {//計算にO(N^2) 読み取りにO(1)
vvl v(n+1, vl(n+1, 0));
rep(i, 0, v.size() - 1) {
v.at(i).at(0) = 1;
v.at(i).at(i) = 1;
}
rep(i, 1, v.size()-1) {
rep(j, 1, i) {
v.at(i).at(j) = v.at(i-1).at(j-1) + v.at(i-1).at(j);
v.at(i).at(j) %= mod;
}
}
return v;
}
ll nCk(int n, int k, ll mod) {//毎回O(max(分子、 分母))
ll ue = 1;
ll sita = 1;
for (int i = 1; i <= k; i++) {
sita *= i;
sita %= mod;
}
for (int i = 1; i <= k; i++) {
ue *= (n-i+1);
ue %= mod;
}
return Div(ue, sita, mod);
}
ll gaiseki(P a, P b) { //原点を中心としてaからbの方向 0以下なら角aObが180°以上
return a.first * b.second - a.second * b.first;
}
ll gaiseki(P a, P b, P c) { //cを中心としてaからbの方向
return (a.first - c.first) * (b.second - c.second) - (a.second - c.second) * (b.first - c.first);
}
ll nto10(string S, ll base) {
ll res = 0;
reverse(all0(S));
while(!S.empty()) {
ll num = S.back() - '0';
if(num < 0 || num > 9) num = 9 + S.back() - 'a' + 1;
res = res * base + num;
S.pop_back();
}
return res;
}
string toN(ll N, ll base) {
if(N == 0) return "0";
string ans ="";
ll MOD = abs(base);
while(N != 0) {
ll first = N % MOD;
while(first < 0) first += MOD;
ans += to_string(first);
N -= first;
N /= base;
}
reverse(all0(ans));
return ans;
}
double DIST(P a, P b) {
return sqrt((a.first - b.first) * (a.first - b.first) + (a.second - b.second) * (a.second - b.second));
}
vp factrization(ll N) {
vp res;
for (int i = 2; i * i <= N; i++) {
ll cnt = 0;
while(N % i == 0) {
cnt++;
N /= i;
}
if(cnt != 0) res.push_back(P(i, cnt));
}
if(N != 1) res.push_back(P(N, 1));
return res;
}
struct comb_fast {//must素数
vl fac;
vl facinv;
vl inv;
ll mod_comb;
comb_fast (ll n, ll mod) {
mod_comb = mod;
fac.assign(n+1, 1);
facinv.assign(n+1, 1);
inv.assign(n+1, 1);
rep(i, 2, n) {
fac.at(i) = fac.at(i-1) * i % mod_comb;
inv.at(i) = mod_comb - inv.at(mod_comb%i) * (mod_comb/i)%mod_comb;
facinv.at(i) = facinv.at(i-1) * inv.at(i) % mod_comb;
}
}
ll get(ll n, ll k) {
if(n < k) return 0;
if(n < 0 || k < 0) return 0;
return fac.at(n) * (facinv.at(k) * facinv.at(n-k)%mod_comb)%mod_comb;
}
};
double KAKUDO(double rad) {
double res = rad * 180 / 3.141592653589793;
return res;
}
double RAD(double kakudo) {
return kakudo / 180 * 3.141592653589793;
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//グローバル変数を置くところ(情報工学意識高め)
ll int_max = 1001001001;
ll ll_max = 1001001001001001001LL;
const double pi = 3.141592653589793;
vl dx{0, 1, 0, -1, 0, 1, 1, -1, -1};
vl dy{0, 0, -1, 0, 1, 1, -1, -1, 1};
//#pragma GCC optimize ("-O3")
//ll mod = 1000000007;
//ll mod = 998244353;
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
vp convex(vp &V) {
ll N = V.size();
vp res(2 * N);
ll k = 0;//k = 次に埋めるidx
rep(i, 0, N-1) {
while(k >= 2 && gaiseki(V.at(i), res.at(k-2), res.at(k-1)) <= 0) {
k--;
}
res.at(k) = V.at(i);
k++;
}
ll t = k;//これより前だと左側包みを削ってしまう
per(i, max(0LL, N-2), 0) {
while(k >= t + 1 && gaiseki(V.at(i), res.at(k-2), res.at(k-1)) <= 0) {
k--;
}
res.at(k) = V.at(i);
k++;
}
res.resize(k-1);
return res;
}
struct Union {
vector<int> Par;
vector<int> size;
vector<int> edge;
Union(int N) {
Par.resize(N+1);
for (int i = 1; i <= N; i++) {
Par.at(i) = i;
}
size.assign(N+1, 1);
edge.assign(N+1, 0);
}
int root(int u) {
if (Par.at(u) != u) {
return Par.at(u) = root(Par.at(u));
}
return u;
}
bool same(int a, int b) {
if (root(a) == root(b)) {
return true;
}
return false;
}
void unit(int a, int b) {
int rootA = root(a);
int rootB = root(b);
if (rootA == rootB) {
edge.at(rootA)++;
return ;
}
if (size.at(rootA) < size.at(rootB)) {
swap(a, b);
rootA = root(a);
rootB = root(b); //常にAにBがくっつくようにする
}
if (size.at(rootA) >= size.at(rootB)) {
Par.at(rootB) = rootA;
size.at(rootA) += size.at(rootB);
edge.at(rootA) += edge.at(rootB);
edge.at(rootA) ++;
}
}
};
void solve() {
ll N;
cin >> N;
vl X(N+1);
vl Y(N+1);
vvvl cnt(2001, vvl(2001, vl()));
rep(i, 1, N) {
cin >> X.at(i) >> Y.at(i);
cnt.at((Y.at(i) + 10000)/10).at((X.at(i) + 10000)/10).push_back(i);
}
auto dist = [&](P a, P b) {
return (a.first - b.first ) * (a.first - b.first) + (a.second - b.second) * (a.second - b.second);
};
vvp group(N+1, vp());
Union uni(N);
rep(i, 1, N) {
ll x_idx = (X.at(i) + 10000)/10;
ll y_idx = (Y.at(i) + 10000)/10;
rep(y, max(0LL, y_idx-1), min(2000LL, y_idx + 1)) {
rep(x, max(0LL, x_idx-1), min(2000LL, x_idx + 1)) {
for(ll idx : cnt.at(y).at(x)) {
if(dist(P(Y.at(i), X.at(i)), P(Y.at(idx), X.at(idx))) <= 100) {
uni.unit(idx, i);
}
}
}
}
}
rep(i, 1, N) {
group.at(uni.root(i)).push_back(P(Y.at(i), X.at(i)));
}
rep(i, 1, N) {
sort(group.at(i).begin(), group.at(i).end());
}
double ans = -1;
rep(i, 1, N) {
if(group.at(i).size() != 0) {
//凸包を計算
//一番遠い点を計算
// ans = max(ans, 一番遠い点 + 2);
vp V = convex(group.at(i));
ll n = V.size();
double tooi = -1;
rep(j, 0, n-2) {
rep(k, j+1, n-1) {
tooi = max(tooi, double(dist(V.at(k), V.at(j))));
}
}
if(V.size() == 1) {
tooi = 0;
}
ans = max(ans, sqrt(tooi) + 2);
}
}
cout << ans << endl;
}
//stringでの数字の下から1桁目は 正:S.at(N-1) 誤:S.at(0)
//if(S.at(i) == 1 ← charなのに1...?
// modは取りましたか...?(´・ω・`)
int main() {
ios::sync_with_stdio(false);
std::cin.tie(nullptr);
cout << fixed << setprecision(15);
solve();
return 0;
}
Astral__