## 469 - Wetlands of Florida

Moderator: Board moderators

vahid sanei
Learning poster
Posts: 84
Joined: Fri Jan 09, 2009 4:37 pm
Location: IRAN

### Re: Wetlands Of Florida - 469

To frandres
I think you should use BFS instead of recursive method for this problem
and you get Run Time error with this code because in your code you dont allocate space for your string

Code: Select all

``````      string position;
position[0] = grid[grid.size()-1][0];
position[1] = ' ';
position[2] = grid[grid.size()-1][2];
``````
it`s better

Code: Select all

``````
string position;
position.resize(3);
position[0] = grid[grid.size()-1][0];
position[1] = ' ';
position[2] = grid[grid.size()-1][2];``````
Impossible says I`m possible

fkrafi
New poster
Posts: 13
Joined: Wed Sep 15, 2010 1:36 pm

### Re: Wetlands Of Florida - 469

Why WA!!!!!

Code: Select all

``````#include<stdio.h>
#include<string>
#include<string.h>
#include<algorithm>
using namespace std;
typedef pair<int, int> pii;
#define SZ 1000

char grid[SZ][SZ], s[SZ];
char seen[SZ][SZ];
int len[SZ], sz, cnt;
int dr[] = {-1, -1, -1, 0, 0, 1, 1, 1};
int dc[] = {-1, 0, 1, -1, 1, -1, 0, 1};

int isNum(char ch)
{
return (ch>='0' && ch<='9');
}

void set()
{
int i, j;
for(i=1; i<=sz; i++)
for(j=0; j<len[i]; j++)
seen[i][j+1] = grid[i][j];
}

void dfs(pii u)
{
cnt++;
seen[u.first][u.second] = 'L';
pii v;
int i;
for(i=0; i<8; i++)
{
v.first = u.first + dr[i];
v.second = u.second + dc[i];
if(v.first<1 || v.second<0 || v.first>sz || v.second>=len[v.first])continue;
if(seen[v.first][v.second]=='W')
dfs(v);
}
}

void input()
{
int r, c, l, i;
pii u;
sz = 0;
while(gets(s))
{
if( isNum(s[0]) )break;
if(s[0]=='L' || s[0]=='W')
{
strcpy(grid[++sz], s);
len[sz] = strlen(s);
}
}
do{
if( !isNum(s[0]) )break;
i = cnt = r = c = 0;
l = strlen(s);
while(i<l && isNum(s[i]))
{
r = r*10 + s[i]-48;
i++;
}
while( !isNum(s[i]) )i++;
while(i<l && isNum(s[i]))
{
c = c*10 + s[i]-48;
i++;
}
u.first = r;
u.second = c;
set();
if(seen[u.first][u.second]=='W' && u.first>=1 && u.first<=sz && u.second>=1 && u.second<=len[u.first])
dfs(u);
printf("%d\n", cnt);
}while(gets(s));

}

int main()
{
int t, flag = 0;
scanf("%d", &t);
while(t--)
{
if(flag)printf("\n");
flag = 1;
input();
}
return 0;
}
``````

rij
New poster
Posts: 5
Joined: Mon Nov 03, 2008 3:59 am
Location: BD
Contact:

### Re: Wetlands Of Florida - 469

Me getting errors . Why?? Please someone tell me what is the problem? Thanks in advance.

Code: Select all

``Got ac problem was in I/O format :)``

Learning poster
Posts: 87
Joined: Thu Dec 15, 2011 3:08 pm

### Re: Wetlands Of Florida - 469

Cutt....After ACC
I m great fool..........
anyway thanks a lot brainfry
Last edited by mahade hasan on Wed Oct 10, 2012 6:32 pm, edited 1 time in total.
we r surrounded by happiness
need eyes to feel it!

brianfry713
Guru
Posts: 5947
Joined: Thu Sep 01, 2011 9:09 am
Location: San Jose, CA, USA

### Re: Wetlands Of Florida - 469

Try input:

Code: Select all

``````1

LLLLLLLLL
LLWWLLWLL
LWWLLLLLL
LWWWLWWLL
LLLWWWLLL
LLLLLLLLL
LLLWWLLWL
LLWLWLLLL
LLLLLLLLL
3 2
3 2``````
Check input and AC output for thousands of problems on uDebug!

enamsustcse
New poster
Posts: 9
Joined: Fri May 04, 2012 9:41 pm
Contact:

### Re: Wetlands Of Florida - 469

I am getting WA!

here is m code:

Code: Select all

``````#include <iostream>
#include <queue>
#include <cctype>
#include <cstdio>
#include <cstdlib>
#include <cstring>
using namespace std;
int bfs (int x, int y);
string graph[99];
string ex[99];
int n,m;
int main()
{
int t, caseno=1,x,y, i;
string in, a, b;
char abc[1000];
string::size_type sz;
cin>>t;
cin>>in;
while(t--)
{
graph[0] = in;
for (i = 1; 1; i++)
{
cin>>in;
if(toupper(in[0])>='A'&&toupper(in[0])<='Z') graph[i] = in;
else break;
}
m = graph[0].size();
n = i;
strcpy(abc,in.c_str());
do
{
//            cout<<in<<"::"<<y<<endl;
in = abc;
for (i=0; i<n; i++)
ex[i] = graph[i];
if(toupper(in[0])>='0'&&toupper(in[0])<='9')
{
x = atoi(in.c_str());
cin>>y;
//                cout<<in<<":@:"<<y<<endl;
cout<<bfs(x-1,y-1)<<endl;
}
else break;
//            cout<<<<":"<<endl;
}
while(scanf("%s", abc)==1);
cout<<endl;
}
return 0;
}

int bfs (int x, int y)
{
if(x<=n&&y<=m&&ex[x][y]=='W')
{
queue <int> q;
q.push(x);
q.push(y);
int cnt=0;
while(!q.empty())
{
int i, j;
int u = q.front();
q.pop();
int v = q.front();
q.pop();
cnt++;
ex[u][v]='L';
for (i=u-1; i<=u+1; i++)
{
for (j=v-1; j<=v+1; j++)
{
if(i>=0&&j>=0&&i<n&&j<m)
{
if(ex[i][j]=='W')
{
ex[i][j]='L';
q.push(i);
q.push(j);
}
}
}
}
}

return cnt;
}
else return 0;

}
``````
-----
Enamul Hassan,
Student,
2nd year, CSE,

brianfry713
Guru
Posts: 5947
Joined: Thu Sep 01, 2011 9:09 am
Location: San Jose, CA, USA

### Re: Wetlands Of Florida - 469

The outputs of two consecutive cases will be separated by a blank line. Don't print an extra blank line at the end.
Check input and AC output for thousands of problems on uDebug!

enamsustcse
New poster
Posts: 9
Joined: Fri May 04, 2012 9:41 pm
Contact:

### Re: Wetlands Of Florida - 469

brianfry713 wrote:The outputs of two consecutive cases will be separated by a blank line. Don't print an extra blank line at the end.
Thanks a lot once more...
-----
Enamul Hassan,
Student,
2nd year, CSE,

brianfry713
Guru
Posts: 5947
Joined: Thu Sep 01, 2011 9:09 am
Location: San Jose, CA, USA

### Re: Wetlands Of Florida - 469

Input:

Code: Select all

``````2

LLLLLLLLL
LLWWLLWLL
LWWLLLLLL
LWWWLWWLL
LLLWWWLLL
LLLLLLLLL
LLLWWLLWL
LLWLWLLLL
LLLLLLLLL
3 2
3 2

LLLLLLLLL
LLLLLLLLL
LWLLLLLLL
LLWWLWWLL
LLLWWWLLL
LLLLLLLLL
LLLWWLLWL
LLWLLLLLL
LLLLLLLLL
3 2
7 5
``````
AC output:

Code: Select all

``````12
12

8
3
``````
Check input and AC output for thousands of problems on uDebug!

shuvokr
Learning poster
Posts: 66
Joined: Tue Oct 02, 2012 8:16 pm

### Re: Wetlands Of Florida - 469

@triplemzim
1

LLLLLLLLL
LLWWLLWLL
LWWLLLLLL
LWWWLWWLL
LLLWWWLLL
LLLLLLLLL
LLLWWLLWL
LLWLWLLLL
LLLLLLLLL
3 2 (press enter and you will get result)
7 5 (press enter and you will get result)
(press enter and your input is terminated)

Code: Select all

``enjoying life ..... ``

triplemzim
New poster
Posts: 48
Joined: Sat Apr 06, 2013 6:02 pm

### Re: Wetlands Of Florida - 469

Code: Select all

``AC :)``
thanks, shuvokr and brianfry713
the most important thing is that after the last case there is no blank line. so you have to terminate that program when EOF reached...
Last edited by triplemzim on Wed Oct 23, 2013 9:51 pm, edited 1 time in total.

brianfry713
Guru
Posts: 5947
Joined: Thu Sep 01, 2011 9:09 am
Location: San Jose, CA, USA

### Re: Wetlands Of Florida - 469

Try the I/O I posted in this thread.
Check input and AC output for thousands of problems on uDebug!

walking_hell
New poster
Posts: 14
Joined: Tue Sep 24, 2013 4:35 pm

### uva 469

why RE !!!

Code: Select all

``````#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cstring>
#include <string>
#include <cctype>
#include <stack>
#include <queue>
#include <list>
#include <vector>
#include <map>
#include <sstream>
#include <cmath>
#include <bitset>
#include <utility>
#include <set>
#include <numeric>
using namespace std;
int tot;
string field[110];
int i;
string fild[110];
int dfs(int x,int y)
{
if(fild[x][y]=='W')
tot++;
fild[x][y]='L';
for(int l=-1;l<=1;l++)
for(int j=-1;j<=1;j++)
{

if(x+l<0 || x+l>=i||y+j<0 || y+j>=fild[0].length()||fild[x+l][y+j]!='W')
continue;
dfs(x+l,y+j);

}
}
int main()
{
int test;

//freopen("/media/Others/input.txt","r",stdin);

cin>>test;
getchar();
getchar();
int flg=0;
for(int ll=0;ll<test;ll++)
{

int flag=0;
char ara[110];
int l=0;
if(flg!=0)
cout<<endl;
flg=1;
while(gets(ara) && strcmp(ara,""))
{

//cout<<ara;
if(ara[0]=='L'|| ara[0]=='W')
{field[l]=ara;
l++;}
if((ara[0]!='L'&&ara[0]!='W')&&flag==0)
{i=l;
flag=1;}
if(ara[0]!='L'&& ara[0]!='W')
{
int row,col;

sscanf(ara,"%d %d",&row,&col);
for(int m=0;m<i;m++)
fild[m]=field[m];
int res=dfs(row,col);
cout<<tot<<endl;
tot=0;

}

}
}
return 0;
}
``````

just_yousef
New poster
Posts: 50
Joined: Tue Dec 17, 2013 11:01 pm

### Re: Wetlands Of Florida - 469

hi..
can any tell me why im I getting WA !!

Code: Select all

``AC :D ``

????????
New poster
Posts: 5
Joined: Mon Nov 11, 2013 7:00 pm

### Re:

Saul Hidalgo wrote:Hi! Test with this cases:

Code: Select all

``````2

LLLLLLLLL
LLWWLLWLL
LWWLLLLLL
LWWWLWWLL
LLLWWWLLL
LLLLLLLLL
LLLWWLLWL
LLWLWLLLL
LLLLLLLLL
3 2
7 5

LLLLLLLLL
LLWWLLWLL
10 2
7 5``````
The correct output is:

Code: Select all

``````12
4

0
0``````
You code have

Code: Select all

``````12
4

0
2``````