結果

問題 No.5006 Hidden Maze
ユーザー platinumplatinum
提出日時 2022-06-11 23:46:39
言語 C++17(gcc12)
(gcc 12.3.0 + boost 1.87.0)
結果
MLE  
実行時間 -
コード長 3,865 bytes
コンパイル時間 2,178 ms
実行使用メモリ 836,224 KB
スコア 0
最終ジャッジ日時 2022-06-12 13:35:48
合計ジャッジ時間 9,322 ms
ジャッジサーバーID
（参考情報） 		judge15 / judge14
このコードへのチャレンジ
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ファイルパターン 結果
other MLE * 1 -- * 99
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ソースコード

diff # 

#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (int)(n); i++)

using namespace std;
using LL = long long;
using P = pair<int,int>;
using vv = vector<vector<int>>;
const int INF = (int)1e9;
const LL LINF = (LL)1e18;
const double eps = 1e-5;
const int min_p = 6;
const int max_p = 15;

int dy[4] = {-1, 1, 0, 0};
int dx[4] = {0, 0, -1, 1};
string dir = "UDLR";

double h[20][21], v[21][20];

string bfs(){
	int dist[20][20];
	rep(i,20){
		rep(j,20) dist[i][j] = -1;
	}
	dist[0][0] = 0;
	queue<P> q;
	q.emplace(0, 0);
	while(!q.empty()){
		pair<int,int> p = q.front(); q.pop();
		int y = p.first, x = p.second;
		int d = dist[y][x];
		if(v[y][x] < 0.5 && dist[y-1][x] == -1){
			dist[y-1][x] = d + 1;
			q.emplace(y - 1, x);
		}
		if(v[y+1][x] < 0.5 && dist[y+1][x] == -1){
			dist[y+1][x] = d + 1;
			q.emplace(y + 1, x);
		}
		if(h[y][x] < 0.5 && dist[y][x-1] == -1){
			dist[y][x-1] = d + 1;
			q.emplace(y, x - 1);
		}
		if(h[y][x+1] < 0.5 && dist[y][x+1] == -1){
			dist[y][x+1] = d + 1;
			q.emplace(y, x + 1);
		}
	}
	string res;
	int y = 19, x = 19;
	if(dist[y][x] == -1){
		rep(i,19) res.push_back('R');
		rep(i,19) res.push_back('D');
		return res;
	}
	while(y != 0 || x != 0){
		int d = dist[y][x];
		if(v[y][x] < 0.5 && dist[y-1][x] == d - 1){
			res.push_back('D');
			y--;
		}
		else if(v[y+1][x] < 0.5 && dist[y+1][x] == d - 1){
			res.push_back('U');
			y++;
		}
		else if(h[y][x] < 0.5 && dist[y][x-1] == d - 1){
			res.push_back('R');
			x--;
		}
		else if(h[y][x+1] < 0.5 && dist[y][x+1] == d - 1){
			res.push_back('L');
			x++;
		}
		else break;
	}
	reverse(res.begin(), res.end());
	return res;
}

struct node{
	int y, x, d;
	node(int y, int x, int d) : y(y), x(x), d(d) {}
	bool operator> (const node &u) const{
		return d > u.d;
	}
};

string dijkstra(){
	int dist[20][20];
	rep(i,20){
		rep(j,20) dist[i][j] = INF;
	}
	char par[20][20];
	dist[0][0] = 0;
	priority_queue<node,vector<node>,greater<>> pq;
	pq.emplace(0, 0, 0);
	while(!pq.empty()){
		node u = pq.top(); pq.pop();
		if(dist[u.y][u.x] != u.d) continue;
		rep(k,4){
			int ny = u.y + dy[k], nx = u.x + dx[k];
			if(ny < 0 || ny >= 20) continue;
			if(nx < 0 || nx >= 20) continue;
			int e = 0;
			if(k == 0) e = 1.0 / (1.0 - v[u.y][u.x]);
			else if(k == 1) e = 1.0 / (1.0 - v[u.y+1][u.x]);
			else if(k == 2) e = 1.0 / (1.0 - h[u.y][u.x]);
			else e = 1.0 / (1.0 - h[u.y][u.x+1]);
			int nd = u.d + e;
			if(dist[ny][nx] <= nd) continue;
			pq.emplace(ny, nx, nd);
			dist[ny][nx] = nd;
			par[ny][nx] = dir[k];
		}
	}
	int now_y = 19, now_x = 19;
	string res;
	while(now_y != 0 || now_x != 0){
		char c = par[now_y][now_x];
		res += c;
		if(c == 'U') now_y++;
		else if(c == 'D') now_y--;
		else if(c == 'L') now_x++;
		else now_x--;
	}
	return res;
}

int main(){
	int H, W, poss;
	cin >> H >> W >> poss;
	assert(H == 20 && W == 20);
	assert(min_p <= poss && poss <= max_p);
	double p = poss;
	p /= 100;

	rep(i,20){
		h[i][0] = 1.0;
		h[i][20] = 1.0;
	}
	rep(j,20){
		v[0][j] = 1.0;
		v[20][j] = 1.0;
	}
	rep(i,20){
		rep(j,19) h[i][j+1] = 0.2;
	}
	rep(i,19){
		rep(j,20) v[i+1][j] = 0.2;
	}

	rep(trial,1001){
		//string ans = bfs();
		string ans = dijkstra();
		cout << ans << endl;

		int res;
		cin >> res;
		if(res == -1){
			cerr << "score = " << 1000 - trial << endl;
			break;
		}
		int y = 0, x = 0;
		int siz = ans.size();
		rep(i,res){
			char c = ans[i];
			if(c == 'U') v[y][x] = 0, y--;
			if(c == 'D') v[y+1][x] = 0, y++;
			if(c == 'L') h[y][x] = 0, x--;
			if(c == 'R') h[y][x+1] = 0, x++;
		}
		if(res < siz){
			char c = ans[res];
			if(c == 'U' && v[y][x] > eps) v[y][x] = 1.0 - (1.0 - v[y][x]) * p;
			if(c == 'D' && v[y+1][x] > eps) v[y+1][x] = 1.0 - (1.0 - v[y+1][x]) * p;
			if(c == 'L' && h[y][x] > eps) h[y][x] = 1.0 - (1.0 - h[y][x]) * p;
			if(c == 'R' && h[y][x+1] > eps) h[y][x+1] = 1.0 - (1.0 - h[y][x+1]) * p;
		}
	}

	return 0;
}
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