时间限制:
10000ms 单点时限:
1000ms 内存限制:
256MB
描述
推箱子是一款经典游戏。如图所示，灰色格子代表不能通过区域，蓝色方格是箱子，黑色圆形代表玩家，含有圆点的格子代表目标点。
规定以下规则：
1、一局游戏中只会有一个箱子，一个玩家和一个目标点。
2、通过方向键控制玩家移动。
3、图中的灰色格子代表墙壁，玩家与箱子都不能通过。
4、推到墙壁的箱子，就无法再将箱子推离墙壁，因为玩家无法到达箱子靠墙壁的一侧去推箱子。也就是说箱子只能以“被推”的方式被移动，不是以“被拉”的方式被移动。但如果玩家将箱子推至墙壁后，垂直墙壁的两侧没有阻碍物，则玩家可以朝这两个不同的方向推移箱子。如果箱子进入角落，就没有办法再推动这个箱子了。
5、玩家是不能走出场景的。玩家推着箱子到达场景边缘，如果继续点击使玩家和箱子向墙壁前进的方向键，箱子和人都会保持不动。玩家的前进方向上如果有墙壁，也是不能前进的。但是这些点击都视为合理的输入。
6、箱子一旦到达目标点，就不能再移动了。但这时，玩家仍然可以在场景内自由行动。如果继续尝试推箱子，那么玩家将会和箱子一起保持在原地不动。
现在，给出一种方向键的点击方案，请判断，这种方案是否能使箱子最终停在目标点上。为了方便表示，我们以0代表空白格子，以4代表不能通过区域，以1代表玩家，以3代表箱子，以2代表目标点。
输入
第一行数据包含三个整数，N，M，S。其中，N(0 < N <= 100)代表格子的宽度，M(0 < M <= 100)代表格子的高度，S(0 < S <= 200)代表测试点的个数。
接下来的M行，每行都会有N个字符，描述当前的盘面。
接下来的S行，每行都代表一个测试点。每行都以一个整数T(0 < T <= 10000)开头，接下来是一个空格和T个字符。这T个字符仅由d，u，l，r这四个字母组成，分别代表了敲击向下，向上，向左，向右的方向键。
输出
对于每个测试点，输出最后箱子是否在目标点上。如果是，输出YES，如果不是，则输出NO。
样例输入
5 4 3 00000 13000 00200 00000 4 rurd 6 urdldr 6 rrrurd
样例输出 YES
YES
NO
代码：
#include "stdafx.h"
#include <string>
#include <stdio.h>
#include <iostream>
using namespace std;
char Board[ 100][100 ]; // 棋盘
char Boardbak[100][100 ];
int main()
{
int n, m , s;
string temp (100, '0');
int player_x = 0 , player_y = 0;
int player_x_bak = 0 , player_y_bak = 0;
bool havaPlayer = false ;
cin >> n >> m >> s;
for (int x = 0; x < m; ++x)
{
cin >> temp;
for ( int y = 0 ; y < n; ++y )
{
if (! havaPlayer && temp [y] == '1')
{
player_x_bak = x;
player_y_bak = y;
havaPlayer = true ;
}
Boardbak [x][ y] = temp [y];
}
}
while (s--)
{
bool isSuccess = false;
int count = 0;
string path (10000, '0');
cin >> count >> path;
//初始化棋盘
for ( int i = 0 ; i < m; ++i )
{
for ( int j = 0 ; j < n; ++j )
{
Board [i][ j] = Boardbak [i][ j];
}
}
//初始化玩家位置
player_x = player_x_bak;
player_y = player_y_bak;
for ( int z = 0 ; z < count;++z )
{
if ( path[z ] == 'd' )//向下
{
if ( player_x + 2 < m) // 判断下面没有越界
{
if (! isSuccess && Board [player_x + 1][ player_y] == '3')// 判断下面有箱子
{
if ( Board[player_x + 2 ][player_y] == '0')// 判断箱子下面是空格
{
//更新棋盘
Board [player_x][player_y] = '0' ;
Board [player_x + 1][ player_y] = '1' ;
Board [player_x + 2][ player_y] = '3' ;
//更新玩家位置
player_x = player_x + 1;
}
else if (Board[player_x + 2 ][player_y] == '2') //箱子下面是目标点
{
isSuccess = true ;
}
}
else // 判断没有箱子，就只有玩家动
{
if ( Board[player_x + 1 ][player_y] == '0')// 玩家下面是空格
{
//更新棋盘
Board [player_x][player_y] = '0' ;
Board [player_x + 1][ player_y] = '1' ;
//更新玩家位置
player_x = player_x + 1;
}
}
}
else
{
if ( Board[player_x + 1 ][player_y] == '0') //下面越界，玩家下面是空格
{
//更新棋盘
Board [player_x][player_y] = '0' ;
Board [player_x + 1][ player_y] = '1' ;
//更新玩家位置
player_x = player_x + 1;
}
}
}
else if (path[z ] == 'u' )//向上
{
if ( player_x - 2 >=0) // 判断上面没有越界
{
if (! isSuccess && Board [player_x - 1][ player_y] == '3')// 判断上面有箱子
{
if ( Board[player_x - 2 ][player_y] == '0')// 判断箱子上面是空格
{
//更新棋盘
Board [player_x][player_y] = '0' ;
Board [player_x - 1][ player_y] = '1' ;
Board [player_x - 2][ player_y] = '3' ;
//更新玩家位置
player_x = player_x - 1;
}
else if (Board[player_x - 2 ][player_y] == '2') //箱子上面是目标点
{
isSuccess = true ;
}
}
else // 判断没有箱子，就只有玩家动
{
if ( Board[player_x - 1 ][player_y] == '0')// 玩家上面空格
{
//更新棋盘
Board [player_x][player_y] = '0' ;
Board [player_x - 1][ player_y] = '1' ;
//更新玩家位置
player_x = player_x - 1;
}
}
}
else
{
if ( Board[player_x - 1 ][player_y] == '0') //上面越界，玩家上面是空格
{
//更新棋盘
Board [player_x][player_y] = '0' ;
Board [player_x - 1][ player_y] = '1' ;
//更新玩家位置
player_x = player_x - 1;
}
}
}
else if (path[z ] == 'l' )//左
{
if ( player_y - 2 >= 0 ) // 判断左边没有越界
{
if (! isSuccess && Board [player_x][player_y -1 ] == '3')// 判断左边有箱子
{
if ( Board[player_x ][player_y - 2] == '0') //判断箱子左边是空格
{
//更新棋盘
Board [player_x][player_y] = '0' ;
Board [player_x][player_y - 1] = '1' ;
Board [player_x][player_y - 2] = '3' ;
//更新玩家位置
player_y = player_y - 1;
}
else if (Board[player_x ][player_y - 2] == '2') //箱子左边是目标点
{
isSuccess = true ;
}
}
else // 判断没有箱子，就只有玩家动
{
if ( Board[player_x ][player_y - 1] == '0') //玩家左边是空格
{
//更新棋盘
Board [player_x][player_y] = '0' ;
Board [player_x][player_y -1 ] = '1' ;
//更新玩家位置
player_y = player_y - 1;
}
}
}
else
{
if ( Board[player_x ][player_y - 1] == '0') //左边越界，玩家左边是空格
{
//更新棋盘
Board [player_x][player_y] = '0' ;
Board [player_x][player_y - 1] = '1' ;
//更新玩家位置
player_y = player_y - 1;
}
}
}
else if (path[z ] == 'r' )//向右
{
if ( player_y + 2 < n) // 判断右边没有越界
{
if (! isSuccess && Board [player_x][player_y + 1] == '3')// 判断右边有箱子
{
if ( Board[player_x ][player_y + 2] == '0') //判断箱子右边是空格
{
//更新棋盘
Board [player_x][player_y] = '0' ;
Board [player_x][player_y + 1] = '1' ;
Board [player_x][player_y + 2] = '3' ;
//更新玩家位置
player_y = player_y + 1;
}
else if (Board[player_x ][player_y + 2] == '2') //箱子右边是目标点
{
isSuccess = true ;
}
}
else // 判断没有箱子，就只有玩家动
{
if ( Board[player_x ][player_y + 1] == '0') //玩家右边是空格
{
//更新棋盘
Board [player_x][player_y] = '0' ;
Board [player_x][player_y + 1] = '1' ;
//更新玩家位置
player_y = player_y + 1;
}
}
}
else
{
if ( Board[player_x ][player_y + 1] == '0') //右边越界，玩家右边是空格
{
//更新棋盘
Board [player_x][player_y] = '0' ;
Board [player_x][player_y + 1] = '1' ;
//更新玩家位置
player_y = player_y + 1;
}
}
}
}
if ( isSuccess)
{
cout << "YES" << endl;
}
else
cout << "NO" << endl;
}
return 0;
}