## 314 - Robot

Moderator: Board moderators

shohag sust cse
New poster
Posts: 4
Joined: Tue Aug 06, 2002 11:38 am

### 314 - Robot

Code: Select all

``````#include<stdio.h>
#include<string.h>

#define MAX_R 51
#define MAX_C 51
#define INF -1

int what_dir(const char *p);
void enqueue(int r,int c,int d);
void dequeue(int& r,int& c,int& d);

long cost[MAX_R][MAX_C][4];
int queue[MAX_R*MAX_C*4+4];

int dr[]={-1,0,1,0};
int dc[]={0,1,0,-1};

char *name_dir[]={"north","east","south","west"};

int main()
{
int R,C,i,j,d;
int sr,sc,tr,tc;
int dir,ndir,min;
int matrix[MAX_R][MAX_C];
char s_dir[10];
int r,c,nr,nc;
while(scanf("%d%d",&R,&C)&&(R||C))
{
for(i=0;i<R;i++)
for(j=0;j<C;j++)
{
scanf("%d",&matrix[i][j]);
for(d=0;d<4;d++)
cost[i][j][d]=INF;
}
scanf("%d %d %d %d %s",&sr,&sc,&tr,&tc,s_dir);
dir=what_dir(s_dir);
cost[sr][sc][dir]=0;
enqueue(sr,sc,dir);
{
dequeue(r,c,dir);
if(r==tr && c==tc)
break;
for(i=1;i<4;i++)
{
nr=r+i*dr[dir];
nc=c+i*dc[dir];
ndir=dir;
if((nr>=0 && nr<R)&&
(nc>=0 && nc<C)&&
(matrix[nr][nc]!=1)&&
(matrix[nr-1][nc-1]!=1)&&
(matrix[nr][nc-1]!=1)&&
(matrix[nr-1][nc]!=1)&&
(cost[nr][nc][ndir]==INF))
{
cost[nr][nc][ndir]=cost[r][c][dir]+1;
enqueue(nr,nc,ndir);
}
else
break;
}
ndir=(dir+1)%4;
if(cost[r][c][ndir]==INF)
{
cost[r][c][ndir]=cost[r][c][dir]+1;
enqueue(r,c,ndir);
}
ndir=(dir+3)%4;
if(cost[r][c][ndir]==INF)
{
cost[r][c][ndir]=cost[r][c][dir]+1;
enqueue(r,c,ndir);
}

}
min=INF;
for(dir=0;dir<3;dir++)
{
if(cost[tr][tc][dir]!=INF)
{
if(min==INF)
min=cost[tr][tc][dir];
else if(min>cost[tr][tc][dir])
min=cost[tr][tc][dir];
}
}
printf("%d\n",min);

}

}

void enqueue(int r,int c,int d)
{
queue[tail++]=(((r*MAX_C)+c)*4+d);
}

void dequeue(int& r,int& c,int& d)
{
int t;
c=t%MAX_C;
r=t/MAX_C;
}

int what_dir(const char *p)
{
int i;
for(i=0;i<4;i++)
if(strcmp(p,name_dir[i])==0)
return i;
return -1;
}``````

shohag sust cse
New poster
Posts: 4
Joined: Tue Aug 06, 2002 11:38 am
Thax all i got Ac.

shohag

Almost Human
Learning poster
Posts: 93
Joined: Sun Jan 12, 2003 3:30 pm

### 314 - Why WA .... ?

Is there any special case I should consider?

thanks

Code: Select all

``````#include <stdio.h>
#include <malloc.h>
#include <string.h>

struct TQueue
{
int x , y , direction , time ;
struct TQueue* next ;
} *head = 0 , *tail ;

void enqueue ( int , int , int , int ) ;
void dequeue ( int* , int* , int* , int* ) ;
void dequeueall ( void ) ;

int map[52][52] , flag[52][52] , direct[52][52][4] ;

int main ( void )
{
int row , column , i , j , srcx , srcy , destx , desty , direction , time , nextx , nexty , nextdirection , prevdirection ;
char temporary[10] ;

freopen ( "314.in" , "r" , stdin ) ;
freopen ( "314.out" , "w" , stdout ) ;

while ( scanf ( "%d %d\n" , &row , &column ) != EOF )
{
if ( row == 0 && column == 0 ) break ;

memset ( &flag , 0 , sizeof ( flag ) ) ;
memset ( &direct , 0 , sizeof ( direct ) ) ;

for ( i = 0 ; i < row ; i ++ )
for ( j = 0 ; j < column ; j ++ )
scanf ( "%d" , &map[i][j] ) ;

scanf ( "%d %d %d %d %s\n" , &srcy , &srcx , &desty , &destx , temporary ) ;

switch ( temporary[0] )
{
case 'n' : direction = 0 ; break ;
case 'e' : direction = 1 ; break ;
case 's' : direction = 2 ; break ;
case 'w' : direction = 3 ; break ;
}

enqueue ( srcx , srcy , direction , 0 ) ;
flag[srcy][srcx] = 1 ;
direct[srcy][srcx][direction] = 1 ;

{
dequeue ( &srcx , &srcy , &direction , &time ) ;

if ( srcx == destx && srcy == desty ) break ;

switch ( direction )
{
case 0 : nextx = srcx ; nexty = srcy - 1 ; break ;
case 1 : nextx = srcx + 1 ; nexty = srcy ; break ;
case 2 : nextx = srcx ; nexty = srcy + 1 ; break ;
case 3 : nextx = srcx - 1 ; nexty = srcy ; break ;
}

if ( nextx >= 0 && nextx < column && nexty >= 0 && nexty < row )
if ( !map[nexty][nextx] && !flag[nexty][nextx] )
enqueue ( nextx , nexty , direction , time + 1 ) , flag[nexty][nextx] = 1 , direct[nexty][nextx][direction] = 1 ;

nextdirection = direction + 1 ;
if ( nextdirection == 4 ) nextdirection = 0 ;
prevdirection = direction - 1 ;
if ( prevdirection < 0 ) prevdirection = 3 ;

if ( !direct[srcy][srcx][nextdirection] )
enqueue ( srcx , srcy , nextdirection , time + 1 ) , direct[srcy][srcx][nextdirection] = 1 ;
if ( !direct[srcy][srcx][prevdirection] )
enqueue ( srcx , srcy , prevdirection , time + 1 ) , direct[srcy][srcx][prevdirection] = 1 ;
}

dequeueall ( ) ;

if ( srcx == destx && srcy == desty )
printf ( "%d\n" , time ) ;
else
printf ( "-1\n" ) ;
}

return 0 ;
}

void enqueue ( int x , int y , int direction , int time )
{
struct TQueue* curr = ( struct TQueue* ) malloc ( sizeof ( struct TQueue ) ) ;

curr -> x = x ;
curr -> y = y ;
curr -> direction = direction ;
curr -> time = time ;
curr -> next = 0 ;

{
}
else
{
tail -> next = curr ;
}
tail = curr ;
}

void dequeue ( int* x , int* y , int* direction , int* time )
{
struct TQueue* curr ;

*x = head -> x ;
*y = head -> y ;
*direction = head -> direction ;
*time = head -> time ;

free ( curr ) ;
}

void dequeueall ( void )
{
int x , y , direction , time ;

{
dequeue ( &x , &y , &direction , &time ) ;
}
}
``````

babor
New poster
Posts: 16
Joined: Sat Jun 07, 2003 4:23 pm
Contact:
Hai, friend I think you didnot consider that at the "destination " at any direction the cost may be shortest. So u have to check all four direction's
cost which is minimum. Thanks
babor

Yen
New poster
Posts: 2
Joined: Mon May 10, 2004 5:32 am
Contact:

### Runtime Error on 314

I have got Runtime Error (SIGSEGV) on problem 314(Robot). I have test my code with several input set and got ok. Here is my code. Please help me.

Code: Select all

``````

#include<stdio.h>
#include<conio.h>

#define MaxM 55L
#define MaxN 55L

#define INF MaxM*MaxN*5L
#define QSIZE MaxN*MaxM

char A[MaxM][MaxN];
int M,N;
long cost[MaxM][MaxN][5];
int front=0;
int rear=0;

struct info
{
int r,c,f;
};
info start,end,Queue[QSIZE+2];

void Enqueue(info item)
{
rear++;
if(front==rear)
{
printf("Error:Queue is full!\n");
if(front==0)
rear=QSIZE-1;
else
rear=rear-1;
}
else
Queue[rear]=item;
}

info Dequeue()
{
info item;
if(front==rear)
{
printf("Error:Queue is empty!\n");
}

else
{
front++;
item=Queue[front];
}
return item;
}

int isempty()
{
return (front-rear);
}

int fun(int u,int v,int x,info y)
{
if(A[u][v]!='#')
{
if(cost[u][v][x] > cost[y.r][y.c][y.f]+1)
{
cost[u][v][x]=cost[y.r][y.c][y.f]+1;

y.r=u;
y.c=v;
y.f=x;

Enqueue(y);
return 1;
}
}
return 0;
}

void BFS()
{
info u;
int i,j,k;
for(i=0;i<=N+3;i++)
for(j=0;j<=M+3;j++)
for(k=0;k<5;k++)
cost[i][j][k]= INF;

cost[start.r][start.c][start.f]=0;
Enqueue(start);

while(isempty())
{
u=Dequeue();
if(u.f==1)
{
fun(u.r,u.c,2,u);
fun(u.r,u.c,4,u);
if( fun(u.r-1,u.c,1,u) )
if( fun(u.r-2,u.c,1,u) )
fun(u.r-3,u.c,1,u);
}
else if(u.f==2)
{
fun(u.r,u.c,3,u);
fun(u.r,u.c,1,u);
if( fun(u.r,u.c+1,2,u) )
if( fun(u.r,u.c+2,2,u) )
fun(u.r,u.c+3,2,u);
}
else if(u.f==3)
{
fun(u.r,u.c,4,u);
fun(u.r,u.c,2,u);
if( fun(u.r+1,u.c,3,u) )
if( fun(u.r+2,u.c,3,u) )
fun(u.r+3,u.c,3,u);
}
else
{
fun(u.r,u.c,1,u);
fun(u.r,u.c,3,u);
if( fun(u.r,u.c-1,4,u) )
if( fun(u.r,u.c-2,4,u) )
fun(u.r,u.c-3,4,u);
}
}
}

int main()
{

int i,j,t;
char s[100];
long min;

while(scanf("%d%d",&M,&N)==2 && (M || N))
{
M=M+3;
N=N+3;

for(i=3;i<M;i++)
for(j=3;j<N;j++)
A[i][j]='.';

for(i=0;i<=M+3;i++)
A[i][0]=A[i][1]=A[i][2]=A[i][3]=A[i][N]=A[i][N+1]=A[i][N+2]='#';

for(i=0;i<=N+3;i++)
A[0][i]=A[1][i]=A[2][i]=A[3][i]=A[M][i]=A[M+1][i]=A[M+2][i]='#';

for(i=3;i<M;i++)
for(j=3;j<N;j++)
{
scanf("%d",&t);
if(t==1)
A[i][j]=A[i+1][j]=A[i][j+1]=A[i+1][j+1]='#';
}

scanf("%d%d%d%d",&start.r,&start.c,&end.r,&end.c);
scanf("%s",s);
start.r += 3;
start.c += 3;
end.r += 3;
end.c += 3;

switch(s[0])
{
case 'n':	start.f=1; break;
case 'e':	start.f=2; break;
case 's':	start.f=3; break;
case 'w':	start.f=4; break;
}

BFS();
min=INF;
for(i=1;i<=4;i++)
if(cost[end.r][end.c][i]<min)
min=cost[end.r][end.c][i];

if(min==INF)
puts("-1");
else
printf("%d\n",min);
}

return 0;
}``````

MatteG
New poster
Posts: 3
Joined: Mon Oct 04, 2004 3:39 pm

### 314, Robot, Help!

I need som tips for problem 314, my version gives right result on example input and runs for a long time at the judge befor i get "Wrong Answer", my gess is that it is som speciale case which my program can

anupam
A great helper
Posts: 405
Joined: Wed Aug 28, 2002 6:45 pm
Contact:
check whether the source node contains an obstacle. check whether the destination node has an obstacle.
"Everything should be made simple, but not always simpler"

MatteG
New poster
Posts: 3
Joined: Mon Oct 04, 2004 3:39 pm
Thats done, i

Emilio
Experienced poster
Posts: 163
Joined: Sun Oct 17, 2004 8:31 pm
Location: Murcia, Spain

### P314 Help, help, help, help, please!!!!

Hello, I can't discover my bug in my code.
If you don't want see my code, can you give me the correct output for the next input?

Here is the input:

Code: Select all

``````9 10
0 0 0 0 0 0 1 0 0 0
0 0 0 0 0 0 0 0 1 0
0 0 0 1 0 0 0 0 0 0
0 0 1 0 0 0 0 0 0 0
0 0 0 0 0 0 1 0 0 0
0 0 0 0 0 1 0 0 0 0
0 0 0 1 1 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
1 0 0 0 0 0 0 0 1 0
7 2 2 7 south
8 7
0 0 0 0 0 0 0
1 0 0 0 0 0 0
0 1 0 0 0 0 1
1 0 0 0 0 0 0
0 0 0 0 0 0 0
0 1 0 0 0 0 0
0 0 0 0 0 0 0
1 0 1 1 0 0 0
4 2 2 3 west
6 13
0 0 0 0 1 1 1 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 1 0 1 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 1
0 0 0 0 0 0 1 0 1 0 0 0 0
3 9 2 6 north
13 19
0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0
1 1 1 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0
0 0 0 0 1 0 0 0 0 1 0 0 1 0 0 0 0 0 0
0 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0
1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0
0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0
0 0 1 0 0 1 0 0 0 0 0 0 1 0 1 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0
0 0 0 0 1 0 0 0 1 1 0 0 0 1 1 0 0 0 0
0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0
0 1 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0
8 9 4 3 west
38 37
0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0
0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0
0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0
0 0 0 0 0 0 0 1 0 0 0 1 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 1 1 0 0 1 0 0 0 1 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0
0 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 1 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 1 1 0 1 0 1
0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 1 1 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0
0 0 0 0 0 0 0 1 0 0 1 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0
0 1 0 0 0 0 0 0 0 1 1 0 1 0 0 0 0 0 0 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0
0 0 0 1 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0
0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 1 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0
0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 1 0 1
0 0 0 1 0 1 0 0 1 0 0 1 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 1 0 0 0 0 0 1 0
0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0
1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 1 0 0 0 0 0 0 1 0 0 0 0
0 0 0 0 0 0 1 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 1 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0
0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0
1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 0 1
0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0
0 0 1 0 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0
0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0
0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 1 0 1 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0
36 31 13 21 east
4 3
0 0 0
0 0 0
1 0 0
0 0 0
1 1 1 1 west
20 17
0 0 0 0 0 0 1 0 1 0 0 0 1 0 0 0 0
0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0
0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0
0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 1 0 0 0 0 0 0 1 0 1 0 0 0 0
0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0
0 0 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0
0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 1 1 0 0 0 0 0 0 1 0 0 0
0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0
0 0 0 0 0 0 0 1 0 0 0 0 0 1 1 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0
0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0
0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0
0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0
5 15 1 9 south
28 46
1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0
0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0
0 0 1 1 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0
1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 1
0 0 0 0 0 1 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0
0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 1 0 0 0 0 0 1 1 1 0 1 0 0
0 0 0 0 1 0 1 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0
0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 0 0 0 0 0 1 1 0 0 0 0 0 1 0 1 0 1 0 0 0 0 0
0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 1 0 0 0 0 1 0 0 0
0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1
0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 1 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0
0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 1 0 0 0
0 0 0 1 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 1 0 0 0 0
0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 1 0 0
0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0
0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 1 0 1 0 0 0 1 1 0 1 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0
0 0 0 0 0 0 0 1 0 0 0 1 0 1 0 0 0 1 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0
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0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0
1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0
2 23 23 18 south
7 46
0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0
0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 1 0 0 0
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1 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0
1 1 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0
1 13 4 17 west
25 14
0 0 0 0 0 0 0 0 0 0 0 0 0 0
1 1 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 1 0 0 0 0
1 1 0 0 1 0 0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0 0 1 0 0 1 0
1 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 1 0 0 0 0 0 0 0 0 0 0
1 0 0 1 1 0 0 0 1 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 1 0 1 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 1 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 1 0 0
0 0 0 0 0 1 0 0 0 0 0 0 0 0
0 0 0 1 0 0 0 1 0 0 0 0 0 0
0 1 0 0 0 1 0 0 0 0 1 1 0 0
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1 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 1 0 0 0 0
0 0 1 0 0 0 0 0 0 0 0 0 0 0
1 0 0 0 0 1 0 0 0 0 0 0 1 0
0 0 0 0 0 0 0 0 0 1 0 0 0 0
0 0 0 0 1 0 1 0 0 0 0 0 0 0
0 0 1 0 0 0 0 0 0 0 1 0 0 0
0 0 0 0 1 0 0 1 0 0 0 0 1 0
19 4 19 5 east
15 4
0 0 0 0
1 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 1
1 0 0 1
0 1 0 0
0 0 0 0
0 1 0 1
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
3 2 8 1 east
29 8
1 0 0 1 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 1 0 0 0 0 0 0
0 1 0 0 0 0 0 0
0 0 0 0 0 0 0 0
1 0 0 0 0 0 0 0
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0 0 0 0 0 0 0 0
0 0 0 1 0 0 0 0
1 0 0 0 0 0 0 0
0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 1
1 0 0 0 0 0 1 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
1 0 0 1 0 0 1 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
1 1 0 0 0 0 0 1
0 0 0 0 0 1 0 0
0 1 0 0 0 0 0 0
0 1 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
2 5 9 4 north
50 10
0 0 0 0 0 1 0 0 0 0
0 0 0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0 0 0
0 1 0 0 0 0 0 0 0 0
1 0 1 0 1 0 0 0 1 0
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0 0 0 1 0 1 0 0 0 0
0 0 0 0 0 0 0 1 0 0
1 0 0 0 0 0 0 0 0 0
1 1 0 0 1 0 0 0 0 0
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0 1 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 1 0 0 0 0 0 0
1 0 0 0 0 0 1 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 1 1 0
0 1 0 1 0 0 1 1 0 0
0 0 0 0 0 0 0 0 0 0
0 1 0 0 0 0 0 0 0 0
0 0 0 0 1 0 0 1 0 0
0 0 0 0 0 1 0 1 0 1
0 0 1 0 0 0 0 0 0 0
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0 0 1 0 0 0 0 0 0 0
0 1 1 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
1 0 0 1 0 1 0 0 0 0
0 0 0 0 0 0 0 0 0 0
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1 0 0 0 0 0 0 0 0 1
0 0 1 0 0 0 0 0 0 0
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0 0 0 0 0 0 1 0 1 0
0 1 1 0 1 0 0 0 0 0
0 0 0 1 1 0 0 0 0 0
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4 7 26 4 south
46 20
0 0 1 0 1 1 0 0 1 0 0 0 0 0 0 0 0 1 1 1
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0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0
0 0 0 0 0 1 0 0 0 1 0 1 0 0 0 0 0 0 0 0
1 1 0 0 0 1 1 0 0 1 0 0 0 0 0 0 0 0 0 1
0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0
1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1
40 4 10 3 west
0 0

``````
Last edited by Emilio on Sun Dec 26, 2004 1:08 am, edited 2 times in total.

UFP2161
A great helper
Posts: 277
Joined: Mon Jul 21, 2003 7:49 pm
Contact:
I got:

Code: Select all

``````12
5
3
7
-1
0
-1
4
20
11
-1
-1
-1
-1
-1
16
-1
-1
-1
-1
-1
10
-1
-1
19
-1
11
-1
-1
-1
-1
13
28
27
-1
-1
4
-1
-1
-1
-1
23
6
1
-1
-1
-1
27
-1``````

Emilio
Experienced poster
Posts: 163
Joined: Sun Oct 17, 2004 8:31 pm
Location: Murcia, Spain
I got ACCEPTED.
My mistake was that I forgot the walls of the room.

Thanks very much!!!

jdmetz
New poster
Posts: 25
Joined: Fri May 27, 2005 5:23 pm
Location: Ann Arbor, MI USA

### here are some test cases

Notes:
- It wasn't clear to me from the problem, but you cannot travel on the edges.
- Note that coordinates are row col (y x)

Here is some sample input:

Code: Select all

``````9 10
0 0 0 0 0 0 1 0 0 0
0 0 0 0 0 0 0 0 1 0
0 0 0 1 0 0 0 0 0 0
0 0 1 0 0 0 0 0 0 0
0 0 0 0 0 0 1 0 0 0
0 0 0 0 0 1 0 0 0 0
0 0 0 1 1 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
1 0 0 0 0 0 0 0 1 0
7 2 2 7 south
2 3
0 0 0
0 0 0
1 1 1 2 west
5 5
0 0 0 0 0
0 0 0 0 0
0 1 1 1 0
0 0 0 0 0
0 0 0 0 0
1 1 4 4 east
2 3
0 0 0
0 0 1
1 1 1 2 east
0 0
``````
And output:

Code: Select all

``````12
3
-1
-1
``````

Experienced poster
Posts: 154
Joined: Sat Apr 17, 2004 9:34 am
Location: EEE, BUET
Why the answer for your 3rd test case should be -1? Can't the robot move through the sides of the grid?
According to the problem statement -
The distance of the track closest to the side of the store is exactly one meter. The robot has a circular shape with diameter equal to 1.6 meter. The track goes through the center of the robot.
You should never take more than you give in the circle of life.

ayon
Experienced poster
Posts: 161
Joined: Tue Oct 25, 2005 8:38 pm