結果

問題 No.1572 XI
ユーザー kaikeykaikey
提出日時 2021-06-27 14:55:54
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 821 ms / 2,000 ms
コード長 4,798 bytes
コンパイル時間 2,747 ms
コンパイル使用メモリ 216,640 KB
最終ジャッジ日時 2025-01-22 14:26:18
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 * 4
other AC * 45
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 # 

#include "bits/stdc++.h"
#include <random>
#include <chrono>
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#define ALL(x) (x).begin(), (x).end()
#define RALL(x) (x).rbegin(), (x).rend()
#define SZ(x) ((lint)(x).size())
#define FOR(i, begin, end) for(lint i=(begin),i##_end_=(end);i<i##_end_;++i)
#define IFOR(i, begin, end) for(lint i=(end)-1,i##_begin_=(begin);i>=i##_begin_;--i)
#define REP(i, n) FOR(i,0,n)
#define IREP(i, n) IFOR(i,0,n)
#define endk '\n'
using namespace std; typedef unsigned long long _ulong; typedef long long int lint; typedef long double ld; typedef pair<lint, lint> plint; typedef pair<ld, ld> pld;
struct fast_ios { fast_ios() { cin.tie(nullptr), ios::sync_with_stdio(false), cout << fixed << setprecision(20); }; } fast_ios_;
template<class T> auto add = [](T a, T b) -> T { return a + b; };
template<class T> auto f_max = [](T a, T b) -> T { return max(a, b); };
template<class T> auto f_min = [](T a, T b) -> T { return min(a, b); };
template<class T> using V = vector<T>;
using Vl = V<lint>; using VVl = V<Vl>;
template< typename T > ostream& operator<<(ostream& os, const vector< T >& v) {
	for (int i = 0; i < (int)v.size(); i++) os << v[i] << (i + 1 != v.size() ? " " : "");
	return os;
}
template< typename T >istream& operator>>(istream& is, vector< T >& v) {
	for (T& in : v) is >> in;
	return is;
}
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return 1; } return 0; }
template <class T>
T div_floor(T a, T b) {
	if (b < 0) a *= -1, b *= -1;
	return a >= 0 ? a / b : (a + 1) / b - 1;
}
template <class T>
T div_ceil(T a, T b) {
	if (b < 0) a *= -1, b *= -1;
	return a > 0 ? (a - 1) / b + 1 : a / b;
}
template <class F> struct rec {
	F f;
	rec(F&& f_) : f(std::forward<F>(f_)) {}
	template <class... Args> auto operator()(Args &&... args) const {
		return f(*this, std::forward<Args>(args)...);
	}
};
lint gcd(lint a, lint b) { if (b == 0) return a; else return gcd(b, a % b); }
lint digit(lint a) { return (lint)log10(a); }
lint e_dist(plint a, plint b) { return abs(a.first - b.first) * abs(a.first - b.first) + abs(a.second - b.second) * abs(a.second - b.second); }
lint m_dist(plint a, plint b) { return abs(a.first - b.first) + abs(a.second - b.second); }
bool check_overflow(lint a, lint b, lint limit) { if (b == 0) return false; return a > limit / b; } // a * b > c => true
void Worshall_Floyd(VVl& g) { REP(k, SZ(g)) REP(i, SZ(g)) REP(j, SZ(g)) chmin(g[i][j], g[i][k] + g[k][j]); }
const lint MOD1000000007 = 1000000007, MOD998244353 = 998244353, INF = 1e18;
lint dx[8] = { 0, -1, 0, 1, 1, -1, 1, -1 }, dy[8] = { -1, 0, 1, 0, -1, -1, 1, 1 };
bool YN(bool flag) { cout << (flag ? "YES" : "NO") << endk; return flag; } bool yn(bool flag) { cout << (flag ? "Yes" : "No") << endk; return flag; }
struct Edge {
	lint from, to;
	ld cost;
	Edge() {

	}
	Edge(lint u, lint v, ld c) {
		cost = c;
		from = u;
		to = v;
	}
	bool operator<(const Edge& e) const {
		return cost < e.cost;
	}
};
struct WeightedEdge {
	lint to;
	lint cost;
	WeightedEdge(lint v, lint c = 1) {
		to = v;
		cost = c;
	}
	bool operator<(const WeightedEdge& e) const {
		return cost < e.cost;
	}
};
using WeightedGraph = V<V<WeightedEdge>>;
typedef pair<pair<lint, ld>, lint> tlint;
typedef pair<tlint, plint> qlint;
typedef pair<string, lint> valstr;

typedef pair<plint, lint> state;
int main() {
	lint H, W;
	cin >> H >> W;
	plint s, t;
	{
		lint x, y;
		cin >> x >> y; x--; y--;
		s = { x, y };
	}
	{
		lint x, y;
		cin >> x >> y; x--; y--;
		t = { x, y };
	}
	V<string> arr(H);
	cin >> arr;

	vector dp(H, vector(W, vector(6, INF)));
	queue<tlint> que;
	que.push({ s, 0 });
	dp[s.first][s.second][0] = 0;
	while (!que.empty()) {
		tlint curr = que.front(); que.pop();
		lint cx = curr.first.first, cy = curr.first.second, ck = curr.second;
		REP(k, 4)
		{
			lint nx = cx + dx[k], ny = cy + dy[k], nk = ck;
			if (nx < 0 || ny < 0 || nx >= H || ny >= W) continue;
			if (arr[nx][ny] == '#') continue;
			if (ck == 0) {
				if (k == 0) nk = 1;
				if (k == 1) nk = 2;
				if (k == 2) nk = 3;
				if (k == 3) nk = 4;
			}
			else if (ck == 1) {
				if (k == 0) nk = 5;
				if (k == 2) nk = 0;
			}
			else if (ck == 3) {
				if (k == 0) nk = 0;
				if (k == 2) nk = 5;
			}
			else if (ck == 2) {
				if (k == 1) nk = 5;
				if (k == 3) nk = 0;
			}
			else if (ck == 4) {
				if (k == 3) nk = 5;
				if (k == 1) nk = 0;
			}
			else {
				if (k == 2) nk = 1;
				if (k == 3) nk = 2;
				if (k == 0) nk = 3;
				if (k == 1) nk = 4;
			}
			if (chmin(dp[nx][ny][nk], dp[cx][cy][ck] + 1)) {
				que.push({ {nx, ny}, nk });
			}
		}
	}
	lint ans = dp[t.first][t.second][0];
	if (ans == INF) ans = -1;
	cout << ans << endk;
}
0