#include <iostream> using namespace std; const int MAX=205; char map[MAX][MAX]; int bfs_search(int si,int sj,int di,int dj) { int dir[4][2]={0,1,0,-1,1,0,-1,0}; int newi,newj; typedef struct { int i,j,lev; int guard; }Queue; Queue Q[MAX*MAX]; Queue e; int top,rear; top=rear=0; Q[rear].i=si;Q[rear].j=sj;Q[rear].guard=0;Q[rear].lev=0; rear++; while(top!=rear) { e=Q[top++]; if(e.i==di && e.j==dj) return e.lev; if(e.guard==1) { e.guard=0; e.lev++; Q[rear++]=e; } else { for(int k=0;k<4;k++) { newi=e.i+dir[k][0]; newj=e.j+dir[k][1]; if(map[newi][newj]!=’#’) { Q[rear].i=newi; Q[rear].j=newj; Q[rear].lev=e.lev+1; if(map[newi][newj]==’x’) Q[rear].guard=1; else Q[rear].guard=0; map[newi][newj]=’#’; rear++; } } } } return 0; } void main() { int N,M; int si,sj,di,dj; while(scanf(“%d%d”,&N,&M)!=EOF) { int i,j; for(i=0;i<=N+1;i++) map[i][0]=map[i][M+1]=’#’; for(j=1;j<=M;j++) map[0][j]=map[N+1][j]=’#’; for(i=1;i<=N;i++) { for(j=1;j<=M;j++) { cin>>map[i][j]; if(map[i][j]==’a’) {si=i;sj=j;} else if(map[i][j]==’r’) {di=i;dj=j;} } } int nstep=bfs_search(si,sj,di,dj); if(nstep!=0) cout<<nstep<<endl; else cout<<“Poor ANGEL has to stay in the prison all his life.”<<endl; } }