hdu 2579

#include<stdio.h>
#include<queue>
#include<iostream>
#include<string.h>
#include<algorithm>
#define N 200
using namespace std;
struct node {
    int x,y,time;
}start,end,cur,next;
char map[N][N];
int visit[N][N][N],k,r,c;
int dis[4][2]={{1,0},{-1,0},{0,-1},{0,1}};
int judge(int a,int b,int ti) {
    if(visit[a][b][ti%k])
        return 0;
    if(a<1||a>r||b<1||b>c)
        return 0;
    if(map[a][b]=='#'&&ti%k!=0)
        return 0;
    return 1;
}
int bfs(node  start) {
    int i;
    memset(visit,0,sizeof(visit));
      queue<node>q;
      start.time=0;
      visit[start.x][start.y][0]=1;
      q.push(start);
      while(!q.empty()) {
           cur=q.front();
           q.pop();
           for(i=0;i<4;i++) {
           next.x=cur.x+dis[i][0];
           next.y=cur.y+dis[i][1];
           next.time=cur.time+1; 
           if(judge(next.x,next.y,next.time)) {    
               if(next.x==end.x&&next.y==end.y)
                   return next.time;
               visit[next.x][next.y][next.time%k]=1;
               q.push(next);
           }
           }
      }
    return -1;
}
int main() {
    int i,j,t,ans;
    scanf("%d",&t);
    while(t--) {
        scanf("%d%d%d",&r,&c,&k);
        for(i=1;i<=r;i++)
            scanf("%s",map[i]+1);
        for(i=1;i<=r;i++)
            for(j=1;j<=c;j++) {
                if(map[i][j]=='Y') {
                    start.x=i;
                    start.y=j;
                }
                if(map[i][j]=='G') {
                    end.x=i;
                    end.y=j;
                }
            }
            ans=bfs(start);
            if(ans==-1)
          printf("Please give me another chance!\n");
            else
                printf("%d\n",ans);
    }
    return 0;
}