hdu 1035

<span style="color: rgb(54, 46, 43); font-family: Arial; font-size: 14px; line-height: 26px;">简单模拟，直接用数组就过了</span>

#include <iostream>
using namespace std;
int n,m,step1,step2,v;
char ch[20][20];
void dzw(int x,int y)
{
    if(x<=n&&x>=1&&y<=m&&y>=1)
    {
        step1++;
        if(ch[x][y]=='W')
        {
            ch[x][y]=++v;
            y-=1;
            dzw(x,y);
        }
        else if(ch[x][y]=='S')
        {
            ch[x][y]=++v;
            x+=1;
            dzw(x,y);
        }
        else if(ch[x][y]=='N')
        {
            ch[x][y]=++v;
            x-=1;
            dzw(x,y);
        }
        else if(ch[x][y]=='E')
        {
            ch[x][y]=++v;
            y+=1;
            dzw(x,y);
        }
        else
        {
            step2=ch[x][y];
        }
    }
}
int main()
{
    int x1,i,j;
    while(cin>>n>>m&&(n!=0&&m!=0))
    {
        cin>>x1;
        step1=step2=v=0;
        for(i=1;i<=n;i++)
        {
            for(j=1;j<=m;j++)
                cin>>ch[i][j];
        }
        dzw(1,x1);
        if(step2==0)
            cout<<step1<<" step(s) to exit"<<endl;
        else
            cout<<step2-1<<" step(s) before a loop of "<<step1-step2<<" step(s)"<<endl;
    }
    return 0;
}