結果
| 問題 |
No.3339 Tree on Checkerboard
|
| コンテスト | |
| ユーザー |
cn_449
|
| 提出日時 | 2025-11-04 23:01:52 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
RE
|
| 実行時間 | - |
| コード長 | 8,753 bytes |
| コンパイル時間 | 6,202 ms |
| コンパイル使用メモリ | 280,624 KB |
| 実行使用メモリ | 7,844 KB |
| 最終ジャッジ日時 | 2025-11-07 20:43:54 |
| 合計ジャッジ時間 | 20,421 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 9 RE * 89 |
ソースコード
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <string>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <array>
#include <iomanip>
#include <utility>
#include <tuple>
#include <functional>
#include <bitset>
#include <cassert>
#include <complex>
#include <stdio.h>
#include <time.h>
#include <numeric>
#include <random>
#include <unordered_set>
#include <unordered_map>
#define all(a) (a).begin(), (a).end()
#define rep(i, n) for (ll i = 0; i < (n); i++)
#define req(i, a, b) for (ll i = (a); i < (b); i++)
#define pb push_back
#define debug(x) cerr << __LINE__ << ' ' << #x << ':' << (x) << '\n'
#define debug2(x, y) cerr << __LINE__ << ' ' << #x << ':' << (x) << ',' << #y << ':' << (y) << '\n'
#define debug3(x, y, z) cerr << __LINE__ << ' ' << #x << ':' << (x) << ',' << #y << ':' << (y) << ',' << #z << ':' << (z) << '\n'
using namespace std;
typedef long long ll;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef long double ld;
template<class T> using P = pair<T, T>;
template<class T> using pri_l = priority_queue<T>;
template<class T> using pri_s = priority_queue<T, vector<T>, greater<T>>;
constexpr int inf = 1000000010;
constexpr int inf2 = 2000000010;
constexpr ll INF = 1000000000000000010;
constexpr ll INF4 = 4000000000000000010;
constexpr int mod1e9 = 1000000007;
constexpr int mod998 = 998244353;
constexpr ld eps = 1e-12;
constexpr ld pi = 3.141592653589793238;
constexpr ll ten(int n) { return n ? 10 * ten(n - 1) : 1; };
int dx[] = { 1,0,-1,0,1,1,-1,-1,0 }; int dy[] = { 0,1,0,-1,1,-1,1,-1,0 };
ll mul(ll a, ll b) { return (b != 0 && a > INF / b ? INF : a * b); }
void fail() { cout << "-1\n"; exit(0); } void no() { cout << "No\n"; exit(0); }
template<class T> void er(T a) { cout << a << '\n'; exit(0); }
template<class T, class U> inline bool chmax(T& a, const U& b) { if (a < b) { a = b; return true; } return false; }
template<class T, class U> inline bool chmin(T& a, const U& b) { if (a > b) { a = b; return true; } return false; }
template<class T> istream& operator >>(istream& s, vector<T>& v) { for (auto& e : v) s >> e; return s; }
template<class T> ostream& operator <<(ostream& s, const vector<T>& v) { for (auto& e : v) s << e << ' '; return s; }
template<class T, class U> ostream& operator << (ostream& s, const pair<T, U>& p) { s << p.first << ' ' << p.second; return s; }
struct fastio {
fastio() {
cin.tie(0); cout.tie(0);
ios::sync_with_stdio(false);
cout << fixed << setprecision(20);
cerr << fixed << setprecision(20);
}
}fastio_;
namespace rdv {
random_device seed_gen;
mt19937_64 engine(seed_gen());
ll rnum(ll r) { return engine() % r; } // [0, r)
ll rnum(ll l, ll r) { return rnum(r - l) + l; } // [l, r)
ll rng(ll l, ll r) { return rnum(l, r + 1); } // [l, r]
double rng01() { return engine() * pow(2, -64); }
template<class T> void shuf(vector<T>& v) { shuffle(all(v), engine); }
void shuf(string& s) { shuffle(all(s), engine); }
}
using namespace rdv;
template<class T> vector<int> compress(vector<T> v) {
int n = v.size();
vector<T> tmp = v;
sort(tmp.begin(), tmp.end());
tmp.erase(unique(tmp.begin(), tmp.end()), tmp.end());
vector<int> res(n);
for (int i = 0; i < n; i++) res[i] = lower_bound(tmp.begin(), tmp.end(), v[i]) - tmp.begin();
return res;
}
#include <atcoder/all>
using namespace atcoder;
constexpr ll mod = mod998;
using mint = static_modint<mod>;
istream& operator >>(istream& s, mint& m) { ll y; s >> y; m = y; return s; }
ostream& operator <<(ostream& s, mint& m) { return s << m.val(); }
ostream& operator <<(ostream& s, const vector<mint>& v) { for (auto& e : v) s << e.val() << ' '; return s; }
vector<mint> fac, inv, facinv;
void modcalc(int n) {
fac.resize(n); inv.resize(n); facinv.resize(n);
fac[0] = 1; fac[1] = 1; inv[1] = 1;
facinv[0] = 1; facinv[1] = 1;
for (ll i = 2; i < n; i++) {
fac[i] = fac[i - 1] * i;
inv[i] = -inv[mod % i] * (mod / i);
facinv[i] = facinv[i - 1] * inv[i];
}
}
mint comb(ll n, ll k) {
if (n < 0 || k < 0 || n < k) return 0;
return fac[n] * facinv[k] * facinv[n - k];
}
mint perm(ll n, ll k) {
if (n < 0 || k < 0 || n < k) return 0;
return fac[n] * facinv[n - k];
}
mint hom(ll n, ll k) {
if (n < 0 || k < 0 || n == 0 && k > 0) return 0;
if (n == 0 && k == 0) return 1;
return fac[n + k - 1] * facinv[k] * facinv[n - 1];
}
class unionfind {
vector<int> par;
vector<int> sz;
public:
unionfind(int n) {
par = vector<int>(n);
for (int i = 0; i < n; i++) par[i] = i;
sz = vector<int>(n, 1);
}
unionfind(int n, vector<int> a) {
par = vector<int>(n);
for (int i = 0; i < n; i++) par[i] = i;
sz = a;
}
int find(int x) {
if (par[x] == x) return x;
else return par[x] = find(par[x]);
}
int size(int x) { return sz[find(x)]; }
bool same(int x, int y) { return find(x) == find(y); }
void unite(int x, int y) {
x = find(x);
y = find(y);
if (x == y) return;
if (sz[x] < sz[y]) {
par[x] = y;
sz[y] += sz[x];
}
else {
par[y] = x;
sz[x] += sz[y];
}
}
};
int main() {
bool DEBUG = false;
int TEST = 1;
if (DEBUG) cin >> TEST;
while (TEST--) {
int n;
cin >> n;
assert(n <= 12);
if (n == 8 or n == 12) {
cout << "-1\n";
continue;
}
if (n <= 7) {
vector a(n, vector<char>(n));
rep(i, n) rep(j, n) {
if ((i + j) % 2 == 0) a[i][j] = '#';
else a[i][j] = '.';
}
vector<P<int>> p;
rep(i, n) rep(j, n) {
if ((i + j) % 2 == 0) p.push_back({ i, j });
}
rep(i, 1LL << ssize(p)) {
unionfind uf(n * n);
vector b = a;
rep(j, ssize(p)) {
if (i >> j & 1) {
b[p[j].first][p[j].second] = '.';
}
}
bool bad = false;
rep(x, n) rep(y, n - 1) {
if (b[x][y] == '.' && b[x][y + 1] == '.') {
if (uf.same(x * n + y, x * n + y + 1)) {
bad = true;
break;
}
uf.unite(x * n + y, x * n + y + 1);
}
}
rep(x, n - 1) rep(y, n) {
if (b[x][y] == '.' && b[x + 1][y] == '.') {
if (uf.same(x * n + y, x * n + y + n)) {
bad = true;
break;
}
uf.unite(x * n + y, x * n + y + n);
}
}
if (bad) {
ll w = 0;
ll x = i;
while (x % 2 == 0) {
x /= 2;
w++;
}
i += 1LL << w;
i--;
continue;
}
rep(x, n) rep(y, n) if (b[x][y] == '.' && !uf.same(1, x * n + y)) bad = true;
if (!bad) {
rep(x, n) {
rep(y, n) cout << b[x][y];
cout << '\n';
}
return 0;
}
}
}
assert(n >= 9);
vector a(n, vector<char>(n, '.'));
rep(i, n) rep(j, n) if (i % 2 == 1 && j % 2 == 1) a[i][j] = '#';
int d = (n + 1) / 2;
vector b(d, vector<char>(d, '.'));
auto op = [&](int i, int j) { a[2 * i][2 * j] ^= '.' ^ '#'; b[i][j] ^= '.' ^ '#'; };
ll t = d;
while (t >= 10 or t == 8) {
for (int i = t - 2; i >= 0; i -= 2) {
op(i, t - 2);
if (i != t - 2) op(t - 2, i);
}
for (int i = t - 3; i >= 0; i -= 2) {
op(i, t - 3);
if (i != t - 3) op(t - 3, i);
}
t -= 3;
}
if (t == 5) {
op(0, 1); op(1, 3); op(2, 0); op(2, 2); op(3, 1); op(3, 3);
}
if (t == 7) {
op(0, 3); op(1, 1); op(1, 5); op(2, 0); op(2, 2); op(2, 4); op(3, 5); op(4, 0); op(4, 2); op(4, 4); op(5, 1); op(5, 3); op(5, 5);
}
if (t == 9) {
op(0, 0); op(0, 5); op(1, 1); op(1, 3); op(1, 7); op(2, 4); op(2, 6); op(3, 1); op(3, 3); op(3, 7); op(4, 0); op(4, 2); op(4, 4); op(4, 6); op(5, 7); op(6, 0); op(6, 2); op(6, 4); op(6, 6); op(7, 1); op(7, 3); op(7, 5); op(7, 7);
}
for (int j = 6; j < d; j++) {
if (b[0][j] == '#' && b[0][j - 1] == '.' && b[0][j - 2] == '#') {
op(0, j); op(0, j - 1); op(0, j - 2);
}
}
if ((d > 9 or d == 8) && b[0][d - 2] == '#') {
op(0, d - 5); op(1, d - 5); op(1, d - 4); op(1, d - 3);
}
if (n == 11) {
op(0, 0); op(0, 2); op(0, 4); op(2, 1); op(2, 3); op(2, 5); op(3, 2); op(3, 4); op(4, 0); op(5, 2); op(5, 4);
}
if (DEBUG) {
rep(i, d) {
rep(j, d) cerr << b[i][j];
cerr << '\n';
}
}
rep(i, n) {
rep(j, n) cout << a[i][j];
cout << '\n';
}
if (DEBUG) {
bool bad = false;
unionfind uf(n * n);
rep(x, n) rep(y, n - 1) {
if (a[x][y] == '.' && a[x][y + 1] == '.') {
if (uf.same(x * n + y, x * n + y + 1)) {
debug2(x, y);
bad = true;
break;
}
uf.unite(x * n + y, x * n + y + 1);
}
}
rep(x, n - 1) rep(y, n) {
if (a[x][y] == '.' && a[x + 1][y] == '.') {
if (uf.same(x * n + y, x * n + y + n)) {
debug2(x, y);
bad = true;
break;
}
uf.unite(x * n + y, x * n + y + n);
}
}
debug(bad);
rep(x, n) rep(y, n) if (a[x][y] == '.' && !uf.same(1, x * n + y)) bad = true;
assert(!bad);
}
}
}
cn_449