結果

問題 No.483 マッチ並べ
コンテスト
ユーザー satanic
提出日時 2017-02-10 23:38:54
言語 C++14
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 3 ms / 2,000 ms
コード長 7,289 bytes
コンパイル時間 1,912 ms
コンパイル使用メモリ 136,028 KB
実行使用メモリ 6,820 KB
最終ジャッジ日時 2024-12-29 11:18:19
合計ジャッジ時間 3,006 ms
ジャッジサーバーID
（参考情報） 		judge2 / judge5
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 * 3
other AC * 53
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 # 

// need
#include <iostream>
#include <algorithm>

// data structure
#include <bitset>
//#include <list>
#include <map>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <utility>
#include <vector>
//#include <array>
//#include <tuple>
#include <unordered_map>
#include <unordered_set>
#include <complex>
//#include <deque>
#include<valarray>

// stream
//#include <istream>
//#include <sstream>
//#include <ostream>

// etc
#include <cassert>
#include <functional>
#include <iomanip>
//#include <typeinfo>
#include <chrono>
#include <random>
#include <numeric>

#define INIT std::ios::sync_with_stdio(false);std::cin.tie(0);
#define VAR(type, ...)type __VA_ARGS__;MACRO_VAR_Scan(__VA_ARGS__);
template<typename T> void MACRO_VAR_Scan(T& t) { std::cin >> t; }
template<typename First, typename...Rest>void MACRO_VAR_Scan(First& first, Rest&...rest) { std::cin >> first; MACRO_VAR_Scan(rest...); }
#define VEC_ROW(type, n, ...)std::vector<type> __VA_ARGS__;MACRO_VEC_ROW_Init(n, __VA_ARGS__); for(int i=0; i<n; ++i){MACRO_VEC_ROW_Scan(i, __VA_ARGS__);}
template<typename T> void MACRO_VEC_ROW_Init(int n, T& t) { t.resize(n); }
template<typename First, typename...Rest>void MACRO_VEC_ROW_Init(int n, First& first, Rest&...rest) { first.resize(n); MACRO_VEC_ROW_Init(n, rest...); }
template<typename T> void MACRO_VEC_ROW_Scan(int p, T& t) { std::cin >> t[p]; }
template<typename First, typename...Rest>void MACRO_VEC_ROW_Scan(int p, First& first, Rest&...rest) { std::cin >> first[p]; MACRO_VEC_ROW_Scan(p, rest...); }
#define OUT(d) std::cout<<d;
#define FOUT(n, d) std::cout<<std::fixed<<std::setprecision(n)<<d;
#define SOUT(n, c, d) std::cout<<std::setw(n)<<std::setfill(c)<<d;
#define SP std::cout<<" ";
#define TAB std::cout<<"\t";
#define BR std::cout<<"\n";
#define ENDL std::cout<<std::endl;
#define FLUSH std::cout<<std::flush;
#define VEC(type, c, n) std::vector<type> c(n);for(auto& i:c)std::cin>>i;
#define MAT(type, c, m, n) std::vector<std::vector<type>> c(m, std::vector<type>(n));for(auto& r:c)for(auto& i:r)std::cin>>i;
#define ALL(a) (a).begin(),(a).end()
#define FOR(i, a, b) for(int i=(a);i<(b);++i)
#define RFOR(i, a, b) for(int i=(b)-1;i>=(a);--i)
#define REP(i, n) for(int i=0;i<int(n);++i)
#define RREP(i, n) for(int i=(n)-1;i>=0;--i)
#define FORLL(i, a, b) for(ll i=ll(a);i<ll(b);++i)
#define RFORLL(i, a, b) for(ll i=ll(b)-1;i>=ll(a);--i)
#define REPLL(i, n) for(ll i=0;i<ll(n);++i)
#define RREPLL(i, n) for(ll i=ll(n)-1;i>=0;--i)
#define PAIR std::pair<int, int>
#define PAIRLL std::pair<ll, ll>
#define IN(a, x, b) (a<=x && x<b)
#define SHOW(d) {std::cerr << #d << "\t:" << d << "\n";}
#define SHOWVECTOR(v) {std::cerr << #v << "\t:";for(const auto& xxx : v){std::cerr << xxx << " ";}std::cerr << "\n";}
#define SHOWVECTOR2(v) {std::cerr << #v << "\t:\n";for(const auto& xxx : v){for(const auto& yyy : xxx){std::cerr << yyy << " ";}std::cerr << "\n";}}
#define SHOWPAIR(p) {std::cerr << #p << "\t:(" << p.first << ",\t" << p.second << ")\n";}
#define SHOWPAIRVECTOR2(v) {std::cerr << #v << "\t:\n";for(const auto& xxx : v){for(const auto& yyy : xxx){std::cerr<<'('<<yyy.first<<", "<<yyy.second<<") ";}std::cerr << "\n";}}
#define SHOWPAIRVECTOR(v) {for(const auto& xxx:v){std::cerr<<'('<<xxx.first<<", "<<xxx.second<<") ";}std::cerr<<"\n";}
#define SHOWQUEUE(a) {std::queue<decltype(a.front())> tmp(a);std::cerr << #a << "\t:";for(int i=0; i<static_cast<int>(a.size()); ++i){std::cerr << tmp.front() << "\n";tmp.pop();}std::cerr << "\n";}
template<typename T> inline T CHMAX(T& a, const T b) { return a = (a < b) ? b : a; }
template<typename T> inline T CHMIN(T& a, const T b) { return a = (a > b) ? b : a; }
#define EXCEPTION(msg) throw std::string("Exception : " msg " [ in ") + __func__ + " : " + std::to_string(__LINE__) + " lines ]"
#define TRY(cond, msg) try {if (cond) EXCEPTION(msg);}catch (std::string s) {std::cerr << s << std::endl;}
void CHECKTIME(std::function<void()> f) { auto start = std::chrono::system_clock::now(); f(); auto end = std::chrono::system_clock::now(); auto res = std::chrono::duration_cast<std::chrono::nanoseconds>((end - start)).count(); std::cerr << "[Time:" << res << "ns  (" << res / (1.0e9) << "s)]\n"; }

#define int ll
using ll = long long;
using ull = unsigned long long;
constexpr int INFINT = 1 << 30;                          // 1.07x10^ 9
constexpr int INFINT_LIM = (1LL << 31) - 1;              // 2.15x10^ 9
constexpr ll INFLL = 1LL << 60;                          // 1.15x10^18
constexpr ll INFLL_LIM = (1LL << 62) - 1 + (1LL << 62);  // 9.22x10^18
constexpr double EPS = 1e-7;
constexpr int MOD = 1000000007;
constexpr double PI = 3.141592653589793238462643383279;

//Union-Find
class UnionFind {
private:
	std::vector<int> parent;
	std::vector<int> height;
	std::vector<int> m_size;

public:
	UnionFind(int size_) : parent(size_), height(size_, 0), m_size(size_, 1) {
		REP(i, size_) {
			parent[i] = i;
		}
	}
	void init(int size_) {
		parent.resize(size_);
		height.resize(size_, 0);
		m_size.resize(size_, 0);
		REP(i, size_) {
			parent[i] = i;
		}
	}
	int find(int x) {
		if (parent[x] == x) {
			return x;
		}
		return parent[x] = find(parent[x]);
	}
	void unite(int x, int y) {
		x = find(x);
		y = find(y);
		if (x == y) return;
		int t = size(x) + size(y);
		m_size[x] = m_size[y] = t;
		if (height[x] < height[y]) parent[x] = y;
		else parent[y] = x;
		if (height[x] == height[y]) ++height[x];
	}
	bool same(int x, int y) {
		return find(x) == find(y);
	}
	int size(int x) {
		if (parent[x] == x) {
			return m_size[x];
		}
		return size(parent[x] = find(parent[x]));
	}
};

int dy4[] = { -1, 0, 1, 0 };
int dx4[] = { 0, 1, 0, -1 };
int dy8[] = { -1, -1, -1, 0, 1, 1, 1, 0 };
int dx8[] = { -1, 0, 1, 1, 1, 0, -1, -1 };

// f=e-v+1
signed main() {
	INIT;
	VAR(int, n);

	auto f = [&](int y, int x) {
		return y * 100 + x;
	};

	UnionFind uf(10000);
	std::vector<int> node(10000);
	std::set<int> ssset;
	REP(i, n) {
		/*
		   3
		  4 2
		   1
		*/
		VAR(int, r0, c0, r1, c1);
		uf.unite(f(--r0, --c0), f(--r1, --c1));
		ssset.insert(f(r0, c0));
		ssset.insert(f(r1, c1));
		int r = r0 - r1, c = c0 - c1;
		if (r == 1 && c == 0) {
			node[f(r0, c0)] |= (1 << 1);
			node[f(r1, c1)] |= (1 << 3);
		}
		else if (r == -1 && c == 0) {
			node[f(r0, c0)] |= (1 << 3);
			node[f(r1, c1)] |= (1 << 1);
		}
		else if (r == 0 && c == 1) {
			node[f(r0, c0)] |= (1 << 4);
			node[f(r1, c1)] |= (1 << 2);
		}
		else if (r == 0 && c == -1) {
			node[f(r0, c0)] |= (1 << 2);
			node[f(r1, c1)] |= (1 << 4);
		}
	}
	std::vector<int> visited(10000);
	REP(i, 100) REP(j, 100) {
		if (visited[f(i, j)]) continue;
		if (uf.size(f(i, j)) == 1) continue;
		int e = 0, v = 0;
		std::set<int> set;
		std::queue<int> que;
		que.push(f(i, j));
		visited[f(i, j)] = true;
		while (!que.empty()) {
			int now = que.front(); que.pop();
			set.insert(now);
			int ni = now / 100, nj = now % 100;
			REP(d, 4) {
				int di = ni + dy4[d];
				int dj = nj + dx4[d];
				if (!IN(0, di, 100) || !IN(0, dj, 100)) continue;
				if (node[now] & (1 << (d + 1))) ++e;
				if (!visited[f(di, dj)] && (node[now] & (1 << (d+1)))) {
					visited[f(di, dj)] = true;
					que.push(f(di, dj));
				}
			}
		}
		v = set.size();
		e /= 2;
		if (e - v + 1 >= 2) {
			OUT("NO")BR;
			return 0;
		}
	}
	OUT("YES")BR;
	return 0;
}
0