644 - Immediate Decodability

[deddy one]

I'm getting WA in this problem
what's wrong
is it my function checking?????


[c]

cut

[/c]

[angga888]

Read the problem carefully...

Your output "decodeable" should be "decodable", right ?

Regards,
Angga888

[deddy one]

oh my god, how can I be this stupid


thx a lot angga
I get it acc now

you're a life saver

[644 - HELPMEPLEASE]

Help me please. I don't know what is wrong. I HATE THIS JUDGE!!!
Maybe u got some source.
[pascal]
program decoding;
var
a:array[1..9] of string[10];
i,j,k,l:byte;
b:string[10];
res:boolean;
function equ(a1,a2:string):boolean;
var i:byte;
res:boolean;
begin
res:=true;
for i:=1 to length(a2) do
res:=res and (a1=a2);
equ:=res;
end;
procedure mainloop;
var w1,w2:byte;
begin
while (k<i) and not(res) do
begin
inc(k);
j:=1;
while (j<=i) and not(res) do
begin
w1:=length(a[k]);
w2:=length(a[j]);
if (j<>k) and (w1<=w2) then
res:=res or equ(a[j],a[k]);
inc(j);
end;
end;
end;
begin
i:=0; l:=0;
while not eof(input) do
begin
readln(input,b);
if b='9' then
begin
k:=0; inc(l);
res:=false;
mainloop;
str(l,b);
if not(res) then
writeln(output,'Set '+b+' is immediately decodable')
else
writeln(output,'Set '+b+' is not immediately decodable');
i:=0;
end
else
begin
inc(i);
a:=b;
end;
end;
end.[/pascal]

[Red Scorpion]

Becareful the 'enter' can be appear everywhere.
I solve this problem by using function getchar, and if the character not '0' or '1', I ignore it.
The hardest of this problem is parsing input, and it always cause WA.

Consider the input can be like this:
0
1
1
0
0
010
00
0
0
9

Hope this helps.

[jihajdu]

Hi,

could someone please give me some test inputs and outputs for problem 644? I've tried lots of tests and my algorithm seems correct but judge gave me WA. Are the constraints of the problem correct? (2-8 codes in each set with 1-10 bits) Thanks in advance!

Jeno

[Jan]

Just check the following test case...

Input:

Code: Select all

01
10
0010
001
9

Output:

Code: Select all

Set 1 is not immediately decodable

Hope it works.

[jihajdu]

Thanks for your test case, it helped!
Cases like 001 after 0010 weren't handled correctly, only 0010 after 001. Now I've got AC.

Jeno

[kangroo]

need help...!!!

Code: Select all

#define foriz(i,n) for( i = 0 ; i < n ; i ++ ) 

bool immediately_decodable ( vecs cd )
{
 sort( cd.begin() , cd.end() );
 int i , j;
 foriz ( i , sz(cd) ) 
 {
  foriz ( j , sz(cd) )
  {
   if ( i != j && sz(cd[j]) >= sz(cd[i]) )
   {
    string x = cd[j].substr ( 0 , sz(cd[i]) );
    if ( x == cd[i] )
     return false;
   }
  }
 }
 return true;
}

int main ()
{
 int cas = 1;
 string s;
 while ( !feof(stdin) )
 {
  vecs codes;
  while ( true )
  {
   cin >> s;
   if ( s == "9" ) break;
   else codes.pb (s);
  }

  if ( immediately_decodable ( codes ) )
   printf ( "Set %d is immediately decodable\n" , cas ++ );
  else
   printf ( "Set %d is not immediately decodable\n" , cas ++ );
  codes.clear();
 }
 return 0;
}

anyone pls help me!!
thanks...

[tanvir_cse]

What is the termination condition of this problem?
No, such type of terination condition.I am getting TLE because of this.Pls, inform

[saiful_sust]

Hello tanvir_cse

U have to read the input upto end of file.
and when u get 9 u will print result

take input like that

while(scanf(" %s", code[num]) == 1)
{
while(1)
{
if (code[num][0] == '9') break;
scanf(" %s", code[++num]);
}
//some code here;
}

[fahim_xubayer]

getting WA.can anyone please help?

Code: Select all

#include<stdio.h>
#include<string.h>
int main(){

  int a,b=0,d,e,f,x,y,z,bi[9][10],l,len[10],zz=1,aa,p,q;
  char c,m[11];
  while(gets(m)){
    
    l=strlen(m);
    len[b]=l;
    
    for(a=0;a<l;a++)
    bi[b][a]=m[a]-48;
    b++;
    if(m[0]!='9')
    continue;
    
    
    p=0;q=0;
  
    for(e=0;e<b;e++){
      for(f=e+1;f<b;f++){
       if(len[e]<len[f]){
          for(a=0;a<len[e];a++){
            if(bi[e][a]!=bi[f][a])
            break;
      
          }
        }
        if(a==len[e]){
   
        p++;
          break;
        }
      }
      if(a==len[e])
      break;
    }
    for(e=b-1;e>=0;e--){
      for(f=e-1;f>=0;f--){
       if(len[e]<len[f]){
         
          for(aa=0;aa<len[e];aa++){
            if(bi[e][aa]!=bi[f][aa])
            break;
          }
        }
        if(aa==len[e]){
    
        q++;
          break;
        }
      }
      if(aa==len[e])
      break;
    }
    if((p>0)||(q>0)){
      p=0;q=0;
      printf("Set %d is not immediately decodable\n",zz);
      zz++;
      b=0;
      continue;
    }
      
    
    if((p==0)&&(q==0)){
    printf("Set %d is immediately decodable\n",zz);
    zz++;
    b=0;
  }
  }
  return 0;
}
    
    
      
      
      
      
    
    

[uDebug]

getting WA.can anyone please help?

Try the following input:

Code: Select all

01
01
9

AC Output:

Code: Select all

Set 1 is not immediately decodable

[uDebug]

Just check the following test case...

Thanks for sharing this great test case!