@Rahul
Scan the matrix and whenver u see a[i][j]=0 put a[i]]0]=0 and a[0][j]=0
Meaning to say that put that row or column as 0
Now,
Scan the first row and first column and whereever u see a 0 make that column
and row 0 respectively
Eg
1 1 1 1
0 1 0 1
1 1 1 0
Answer shud be
0 1 0 0
0 0 0 0
0 0 0 0
Scan Array First After Scanning it become
0 1 0 0
0 1 0 1
0 1 1 1
Now Scan first row and for a[0][j] make a[i][j] 0
so
0 1 0 0
0 1 0 0
0 1 0 0
Now scan column ..Remember to start from a[1][0] and a[0][1]
0 1 0 0
0 0 0 0
0 0 0 0
Hope it helps
Ankur
On Fri, Sep 30, 2011 at 3:47 PM, rahul sharma <rahul23111...@gmail.com>wrote:
> provide me with o(1) space ...i need it vey urgent.....can it be
> done...thnx in advance.
>
>
> On Fri, Sep 30, 2011 at 3:44 PM, rahul sharma <rahul23111...@gmail.com>wrote:
>
>> sorry n*m complex where n rows and m col
>> but correct for space pzl and it uses two xtras array row and col
>>
>>
>> On Fri, Sep 30, 2011 at 3:42 PM, rahul sharma <rahul23111...@gmail.com>wrote:
>>
>>> i cant find xact soln on previous thread????i have sol with n*n
>>> complexity but used space,, i.e
>>>
>>> scan whole matrix
>>> if( matrix([i][j]==1)
>>> {
>>> row[i]=1;
>>> col[j]=1;
>>> }
>>>
>>> scan agin
>>> if(row[i]==1 ||| col[j]==1)
>>> matrix[i][j]=0;
>>>
>>>
>>> two n*n loops so takes n*n and uses space too plz give me opt. soln
>>>
>>> On Fri, Sep 30, 2011 at 3:08 PM, Yogesh Yadav <medu...@gmail.com> wrote:
>>>
>>>> Already discussed
>>>>
>>>>
>>>> https://groups.google.com/group/algogeeks/browse_thread/thread/8a3e1a6665702f54/66bb2e804b43ae1d?hl=en&lnk=gst&q=MS+question+ankur#66bb2e804b43ae1d
>>>>
>>>> .....
>>>>
>>>>
>>>> On Fri, Sep 30, 2011 at 2:59 PM, sumit kumar pathak <
>>>> sumitkp1...@gmail.com> wrote:
>>>>
>>>>> *find all the zeros in first iteration and store (size = array bool
>>>>> [2n])*
>>>>> *and then make zero. *
>>>>> *time = O(n^2)*
>>>>> *space = O(n)*
>>>>> *
>>>>> *
>>>>> *case 2:*
>>>>> * if any zero whole matrix zero, (once we get a zero its row and
>>>>> column will become zero which in turn lead to whole matrix being zero).
>>>>> *
>>>>> *
>>>>> *regards
>>>>> - Sumit Kumar Pathak
>>>>> (Sumit/ Pathak/ SKP ...)
>>>>> *Smile is only good contagious thing.*
>>>>> *Spread it*!!!!!
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> On Fri, Sep 30, 2011 at 2:38 PM, rahul sharma <rahul23111...@gmail.com
>>>>> > wrote:
>>>>>
>>>>>> it will zero only row not column
>>>>>>
>>>>>> On Fri, Sep 30, 2011 at 12:25 PM, Tamanna Afroze <afroze...@gmail.com
>>>>>> > wrote:
>>>>>>
>>>>>>>
>>>>>>> if(matrix[i][j]==0){
>>>>>>> for(int j=0;j<n;j++)
>>>>>>> matrix[i][j]=0;
>>>>>>> }
>>>>>>>
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