結果

問題 No.2675 KUMA
ユーザー ecottea
提出日時 2024-03-16 02:12:18
言語 C++17(gcc12)
(gcc 12.3.0 + boost 1.87.0)
結果
AC  
実行時間 1,983 ms / 2,000 ms
コード長 8,340 bytes
コンパイル時間 26,952 ms
コンパイル使用メモリ 359,660 KB
最終ジャッジ日時 2025-02-20 06:40:46
ジャッジサーバーID
(参考情報)
judge3 / judge2
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 2
other AC * 47
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 #
プレゼンテーションモードにする

//
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#ifndef HIDDEN_IN_VS //
//
#define _CRT_SECURE_NO_WARNINGS
//
#include <bits/stdc++.h>
using namespace std;
//
using ll = long long; using ull = unsigned long long; // -2^63 2^63 = 9 * 10^18int -2^31 2^31 = 2 * 10^9
using pii = pair<int, int>; using pll = pair<ll, ll>; using pil = pair<int, ll>; using pli = pair<ll, int>;
using vi = vector<int>; using vvi = vector<vi>; using vvvi = vector<vvi>; using vvvvi = vector<vvvi>;
using vl = vector<ll>; using vvl = vector<vl>; using vvvl = vector<vvl>; using vvvvl = vector<vvvl>;
using vb = vector<bool>; using vvb = vector<vb>; using vvvb = vector<vvb>;
using vc = vector<char>; using vvc = vector<vc>; using vvvc = vector<vvc>;
using vd = vector<double>; using vvd = vector<vd>; using vvvd = vector<vvd>;
template <class T> using priority_queue_rev = priority_queue<T, vector<T>, greater<T>>;
using Graph = vvi;
//
const double PI = acos(-1);
const vi DX = { 1, 0, -1, 0 }; // 4
const vi DY = { 0, 1, 0, -1 };
int INF = 1001001001; ll INFL = 4004004003104004004LL; // (int)INFL = 1010931620;
//
struct fast_io { fast_io() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(18); } } fastIOtmp;
//
#define all(a) (a).begin(), (a).end()
#define sz(x) ((int)(x).size())
#define lbpos(a, x) (int)distance((a).begin(), std::lower_bound(all(a), x))
#define ubpos(a, x) (int)distance((a).begin(), std::upper_bound(all(a), x))
#define Yes(b) {cout << ((b) ? "Yes\n" : "No\n");}
#define rep(i, n) for(int i = 0, i##_len = int(n); i < i##_len; ++i) // 0 n-1
#define repi(i, s, t) for(int i = int(s), i##_end = int(t); i <= i##_end; ++i) // s t
#define repir(i, s, t) for(int i = int(s), i##_end = int(t); i >= i##_end; --i) // s t
#define repe(v, a) for(const auto& v : (a)) // a
#define repea(v, a) for(auto& v : (a)) // a
#define repb(set, d) for(int set = 0, set##_ub = 1 << int(d); set < set##_ub; ++set) // d
#define repis(i, set) for(int i = lsb(set), bset##i = set; i >= 0; bset##i -= 1 << i, i = lsb(bset##i)) // set
#define repp(a) sort(all(a)); for(bool a##_perm = true; a##_perm; a##_perm = next_permutation(all(a))) // a
#define smod(n, m) ((((n) % (m)) + (m)) % (m)) // mod
#define uniq(a) {sort(all(a)); (a).erase(unique(all(a)), (a).end());} //
#define EXIT(a) {cout << (a) << endl; exit(0);} //
#define inQ(x, y, u, l, d, r) ((u) <= (x) && (l) <= (y) && (x) < (d) && (y) < (r)) //
//
template <class T> inline ll powi(T n, int k) { ll v = 1; rep(i, k) v *= n; return v; }
template <class T> inline bool chmax(T& M, const T& x) { if (M < x) { M = x; return true; } return false; } // true
    
template <class T> inline bool chmin(T& m, const T& x) { if (m > x) { m = x; return true; } return false; } // true
    
template <class T> inline T get(T set, int i) { return (set >> i) & T(1); }
//
template <class T, class U> inline istream& operator>>(istream& is, pair<T, U>& p) { is >> p.first >> p.second; return is; }
template <class T> inline istream& operator>>(istream& is, vector<T>& v) { repea(x, v) is >> x; return is; }
template <class T> inline vector<T>& operator--(vector<T>& v) { repea(x, v) --x; return v; }
template <class T> inline vector<T>& operator++(vector<T>& v) { repea(x, v) ++x; return v; }
#endif //
#if __has_include(<atcoder/all>)
#include <atcoder/all>
using namespace atcoder;
#ifdef _MSC_VER
#include "localACL.hpp"
#endif
//using mint = modint1000000007;
using mint = modint998244353;
//using mint = modint; // mint::set_mod(m);
namespace atcoder {
inline istream& operator>>(istream& is, mint& x) { ll x_; is >> x_; x = x_; return is; }
inline ostream& operator<<(ostream& os, const mint& x) { os << x.val(); return os; }
}
using vm = vector<mint>; using vvm = vector<vm>; using vvvm = vector<vvm>; using vvvvm = vector<vvvm>; using pim = pair<int, mint>;
#endif
#ifdef _MSC_VER // Visual Studio
#include "local.hpp"
#else // gcc
inline int popcount(int n) { return __builtin_popcount(n); }
inline int popcount(ll n) { return __builtin_popcountll(n); }
inline int lsb(int n) { return n != 0 ? __builtin_ctz(n) : -1; }
inline int lsb(ll n) { return n != 0 ? __builtin_ctzll(n) : -1; }
inline int msb(int n) { return n != 0 ? (31 - __builtin_clz(n)) : -1; }
inline int msb(ll n) { return n != 0 ? (63 - __builtin_clzll(n)) : -1; }
#define dump(...)
#define dumpel(v)
#define dump_list(v)
#define dump_mat(v)
#define input_from_file(f)
#define output_to_file(f)
#define Assert(b) { if (!(b)) while (1) cout << "OLE"; }
#endif
void WA() {
auto start = chrono::system_clock::now();
int n;
cin >> n;
vi x(n), y(n);
rep(i, n) cin >> x[i] >> y[i];
++x; ++x;
++y; ++y;
vvi ex(2010, vi(2010));
rep(i, n) ex[x[i]][y[i]] = 1;
const vi dx = { 2, 2, -2, -2, -1, 1, -1, 1 };
const vi dy = { -1, 1, -1, 1, -2, -2, 2, 2 };
int res = INF;
mt19937_64 mt((int)time(NULL));
uniform_int_distribution<int> rnd(0, 7);
while (1) {
unordered_map<ll, int> d;
bool ok = true;
rep(i, n) {
int k = rnd(mt);
if (ex[x[i] + dx[k]][y[i] + dy[k]]) {
ok = false;
break;
}
ll h = (x[i] + dx[k]) * (ll)INF + (y[i] + dy[k]);
int dir = k / 2;
if (d.count(h) && d[h] != dir) {
ok = false;
break;
}
d[h] = dir;
}
if (ok) chmin(res, sz(d));
auto now = chrono::system_clock::now();
auto msec = chrono::duration_cast<chrono::milliseconds>(now - start).count();
if (msec >= 1950) break;
}
if (res == INF) res = -1;
cout << res << endl;
}
int main() {
// input_from_file("input.txt");
// output_to_file("output.txt");
auto start = chrono::system_clock::now();
int n;
cin >> n;
vi x(n), y(n);
rep(i, n) cin >> x[i] >> y[i];
vector<pii> xy(n);
rep(i, n) xy[i] = { x[i], y[i] };
//
// sort(all(xy));
//
mt19937_64 mt((int)time(NULL));
shuffle(all(xy), mt);
rep(i, n) tie(x[i], y[i]) = xy[i];
rep(i, n) {
x[i] += 4;
y[i] += 4;
}
constexpr int W = 1010;
int ex[W][W];
rep(i, W) rep(j, W) ex[i][j] = -2;
rep(i, n) ex[x[i]][y[i]] = -1;
constexpr int dx[8] = {2, 2, -2, -2, -1, 1, -1, 1};
constexpr int dy[8] = {-1, 1, -1, 1, -2, -2, 2, 2};
int deg[W][W];
rep(i, W) rep(j, W) deg[i][j] = 0;
rep(i, n) rep(k, 8) {
int x2 = x[i] + dx[k];
int y2 = y[i] + dy[k];
deg[x2][y2]++;
}
int res = INF;
int cost = 0;
function<void(int)> rf = [&](int i) {
//
auto now = chrono::system_clock::now();
auto msec = chrono::duration_cast<chrono::milliseconds>(now - start).count();
if (msec >= 1980) {
if (res == INF) res = -1;
EXIT(res);
}
// 調
if (cost >= res) return;
if (i == n) {
chmin(res, cost);
return;
}
int lx = -1, ly = -1, lk = -1;
rep(k, 8) {
int x2 = x[i] + dx[k];
int y2 = y[i] + dy[k];
if (ex[x2][y2] == -1) continue;
if (ex[x2][y2] != -2 && ex[x2][y2] != k / 2) continue;
// 調 1
if (deg[x2][y2] == 1) {
if (lx == -1) {
lx = x2;
ly = y2;
lk = k;
}
}
else {
int ex_prv = ex[x2][y2];
if (ex[x2][y2] == -2) cost++;
ex[x2][y2] = k / 2;
rf(i + 1);
if (ex_prv == -2) cost--;
ex[x2][y2] = ex_prv;
}
}
if (lx != -1) {
int ex_prv = ex[lx][ly];
if (ex[lx][ly] == -2) cost++;
ex[lx][ly] = lk / 2;
rf(i + 1);
if (ex_prv == -2) cost--;
ex[lx][ly] = ex_prv;
}
};
rf(0);
if (res == INF) res = -1;
cout << res << endl;
}
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