結果
| 問題 | No.2928 Gridpath | 
| コンテスト | |
| ユーザー |  | 
| 提出日時 | 2024-10-17 21:28:20 | 
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) | 
| 結果 | 
                                AC
                                 
                             | 
| 実行時間 | 2 ms / 2,000 ms | 
| コード長 | 4,146 bytes | 
| コンパイル時間 | 7,329 ms | 
| コンパイル使用メモリ | 449,684 KB | 
| 実行使用メモリ | 6,820 KB | 
| 最終ジャッジ日時 | 2024-10-17 21:28:29 | 
| 合計ジャッジ時間 | 7,584 ms | 
| ジャッジサーバーID (参考情報) | judge4 / judge2 | 
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| ファイルパターン | 結果 | 
|---|---|
| sample | AC * 3 | 
| other | AC * 20 | 
ソースコード
#include "bits/stdc++.h"
#include <stdio.h>
#include <math.h>
#include "atcoder/all"
#include <float.h>
#include <boost/multiprecision/cpp_int.hpp>
using namespace boost::multiprecision;
using namespace std;
using namespace atcoder;
using ll = long long;
using ull = unsigned long long;
using mint = modint998244353;
using mint2 = modint1000000007;
const double eps = 1e-9;
#define REP(i, n) for (ll i = 0; i < ll(n); ++i)
#define REPI(i, init, n) for (ll i = init; i < ll(n); ++i)
#define REPD(i, init) for (ll i = init; i >=0; --i)
#define REPDI(i, init, n) for (ll i = init; i >=n; --i)
#define REPE(i, c) for (const auto& i : c)
#define TCASE() ll _ttt; cin >> _ttt; while(_ttt--)
using vl = vector<ll>; using vvl = vector<vl>; using vvvl = vector<vvl>; using dl = deque<ll>;
#define VLI(a, n) vector<ll> a; a.assign(n, 0); for(auto& x : a) cin >> x;
#define DLI(a, n) deque<ll> a; a.assign(n, 0); for(auto& x : a) cin >> x;
#define VSI(a, n) vector<string> a; a.assign(n, ""); for(auto& x : a) cin >> x;
#define VVLI(a, n, m, init) vector<vector<ll>> a(n); for(auto& x : a) x.assign(m, init);
using vd = vector<double>; using pl = pair<ll, ll>; using vpl = vector<pl>;
struct uv { ll u; ll v; ll c; };
#define VUVI(a, n) vector<uv> a; a.assign(n, {0, 0, 1}); for(auto& x : a) {cin >> x.u >> x.v; x.u--; x.v--;}
#define VUVCI(a, n) vector<uv> a; a.assign(n, {0, 0, 0}); for(auto& x : a) {cin >> x.u >> x.v >> x.c; x.u--; x.v--;}
vvl to_edge(const ll n, const vector<uv>& v) { vvl ret(n); for (auto& x : v) ret[x.u].push_back(x.v); return ret; }
vvl to_edge_d(const ll n, const vector<uv>& v) { vvl ret(n); for (auto& x : v) { ret[x.u].push_back(x.v); ret[x.v].push_back(x.u); } return ret; }
template <class T = long long> using pql = priority_queue<T>;
template <class T = long long> using pqg = priority_queue<T, vector<T>, greater<T>>;
using vm = vector<mint>; using vvm = vector<vm>;
ostream& operator<<(ostream& os, const mint& v) { os << v.val(); return os; }
void yn(bool f) { std::cout << (f ? "Yes" : "No") << endl; };
template<class T> void ov(const T& v) { for (auto it = v.begin(); it != v.end(); it++) { if (it != v.begin()) cout << " "; cout << *it; } };
template<> void ov(const vm& v) { for (auto it = v.begin(); it != v.end(); it++) { if (it != v.begin()) cout << " "; cout << it->val(); } };
const ll llhuge = 1LL << 60; //十分でかいが多少足しても溢れない数値
auto gmax(const auto& a, const auto& b) { return a > b ? a : b; };
auto gmin(const auto& a, const auto& b) { return a < b ? a : b; };
bool chmin(auto& a, const auto& b) { const auto olda = a; a = gmin(a, b); return olda != a; }
bool chmax(auto& a, const auto& b) { const auto olda = a; a = gmax(a, b); return olda != a; }
void sort(auto& v) { std::ranges::sort(v); };
void rev(auto& v) { std::ranges::reverse(v); };
template<class T> auto p_sum(const T& v) { T ret(v.size()); std::partial_sum(begin(v), end(v), ret.begin()); return ret; };
template<class T, class K = T::key_type, class V = T::mapped_type> [[nodiscard]] V myat(const T& mp, const K& key) { return mp.find(key) == mp.end() ? V() : mp.at(key); }
template<class T> T ceil(const T a, const T b) { return (a + b - 1) / b; }
ll h, w;
ll si, sj;
ll gi, gj;
vvl m;
ll ans = 0;
void df(ll i, ll j, ll pi, ll pj) {
	if (i < 0 || i >= h || j < 0 || j >= w) return;
	bool ok = true;
	REP(x, 4) {
		ll di = i + (x == 0 ? 1 : x == 1 ? -1 : 0);
		ll dj = j + (x == 2 ? 1 : x == 3 ? -1 : 0);
		if (di == pi && dj == pj) continue;
		if (di < 0 || di >= h || dj < 0 || dj >= w) continue;
		if (m[di][dj] == 1) {
			ok = false; break;
		}
	}
	if (!ok) return;
	if (i == gi && j == gj) {
		ans++;
		return;
	}
	m[i][j] = 1;
	REP(x, 4) {
		ll di = i + (x == 0 ? 1 : x == 1 ? -1 : 0);
		ll dj = j + (x == 2 ? 1 : x == 3 ? -1 : 0);
		if (di == pi && dj == pj) continue;
		if (di < 0 || di >= h || dj < 0 || dj >= w) continue;
		df(di, dj, i, j);
	}
	m[i][j] = 0;
}
int main() {
	cin.tie(nullptr);
	ios::sync_with_stdio(false);
	
	cin >> h >> w;
	cin >> si >> sj;
	cin >> gi >> gj;
	si--;
	sj--;
	gi--;
	gj--;
	m.assign(h, vl(w, 0));
	df(si, sj, -1, -1);
	cout << ans << endl;
}
            
            
            
        