Nice explanation n nice code...
On Sun, Feb 27, 2011 at 8:38 PM, gaurav gupta <1989.gau...@googlemail.com>wrote:
> @pacific in your case a[0][0] might be wrong. So lets do this :
>
> a[0][0] = a[0][0 to n-1] & a[1 to n-1][0] // & of all elements in first
> row and first column
>
> for( int i=1; i<n; i++)
> {
> for( int j=1;j<n;j++)
> {
> a[0][i] &= a[j][i]; // a[0][i] contains & of all elements
> of ith column
> a[i][0] &= a[i][j]; // a[i][0] contains & of all elements
> of ith row
> }
> }
>
> for( int i=1; i<n; i++)
> {
> for( int j=1;j<n;j++)
> {
> a[i][j] = a[i][0] & a[0][j] ;
> }
> }
>
> On Sun, Feb 27, 2011 at 6:37 PM, gaurav gupta
> <1989.gau...@googlemail.com>wrote:
>
>> @pacific Absolutely correct.
>>
>> Thanks for the explanation.
>>
>>
>> On Sun, Feb 27, 2011 at 6:14 PM, pacific pacific
>> <pacific4...@gmail.com>wrote:
>>
>>> 1. do & operation on all the values in each column and store it in the
>>> first row of each column
>>> 2. do & operation on all the values in each row and store it in the first
>>> column of each row.
>>> (when writing at a[0][0] do & operation with the value computed at 1.)
>>> 3. Now to find out the value at a[i][j] ,you need to do a[i][0] & a[0][j]
>>>
>>> On Sun, Feb 27, 2011 at 12:03 PM, Rajnish <rajnish.i...@gmail.com>wrote:
>>>
>>>> 1.) Traverse the whole matrix and replace each 0 value with -1.
>>>> 2.) Traverse the matrix again,all the 1 values are replaced with 0 in
>>>> the row and column of the index where a -1 value is found.
>>>> 3.) Set all -1 values to zero and we have the output array.
>>>> time complexity: O(n^2)
>>>> space complexity: O(1)
>>>>
>>>>
>>>> On Feb 27, 2:29 am, gaurav gupta <1989.gau...@googlemail.com> wrote:
>>>> > A NxN binary matrix is given. If a row contains a 0 all element in the
>>>> > row will be set to 0 and if a column contains a 0 all element of the
>>>> > column will be set to 0. You have to do it in O(1) space.
>>>> >
>>>> > example :
>>>> >
>>>> > input array :
>>>> >
>>>> > 1 0 1 1 0
>>>> > 0 1 1 1 0
>>>> > 1 1 1 1 1
>>>> > 1 0 1 1 1
>>>> > 1 1 1 1 1
>>>> >
>>>> > result array :
>>>> >
>>>> > 0 0 0 0 0
>>>> > 0 0 0 0 0
>>>> > 0 0 1 1 0
>>>> > 0 0 0 0 0
>>>> > 0 0 1 1 0
>>>> >
>>>> > Thanks & Regards,
>>>> > Gaurav Gupta
>>>>
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>>>>
>>>
>>>
>>> --
>>> regards,
>>> chinna.
>>>
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>>
>>
>>
>> --
>> Thanks & Regards,
>> Gaurav Gupta
>>
>> "Quality is never an accident. It is always result of intelligent effort"
>> - John Ruskin
>>
>>
>
>
> --
> Thanks & Regards,
> Gaurav Gupta
> 7676-999-350
>
>
> "Quality is never an accident. It is always result of intelligent effort" -
> John Ruskin
>
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