@ankit thanks for correcting @naveen yeah that will make it more precise On Wed, Jan 5, 2011 at 7:51 PM, Ankit Babbar <ankitbabba...@gmail.com>wrote:
> @ Aditya: Mac's Solution works correctly....for your example: > > Start from 24(top right)..24>5: go left; 9>5: go left; 1<3: go > down; 2<3:go down: 3 found..:) > > > > > On Wed, Jan 5, 2011 at 7:37 PM, Naveen Kumar > <naveenkumarve...@gmail.com>wrote: > >> I think if x < a[n/2][n/2] than we need to search in 1st quadrant >> otherwise in others. >> >> >> On Wed, Jan 5, 2011 at 7:20 PM, sourabh jakhar >> <sourabhjak...@gmail.com>wrote: >> >>> aditya solution is correct >>> it is a standard question of young tabuleau >>> it is complexity is log(n) >>> >>> >>> On Wed, Jan 5, 2011 at 6:52 PM, ADITYA KUMAR <aditya...@gmail.com>wrote: >>> >>>> @MAC >>>> ur solution is wrong >>>> >>>> 1 9 24 >>>> 2 12 33 >>>> 3 16 49 >>>> >>>> search for 3 >>>> >>>> >>>> O(logn) solution >>>> let the matrix be A[][] and number to be searched is x >>>> divide the array from middle in 4 parts lets say it four quadrants >>>> now check if x>A[n/2][n/2] search in bottom right quadrant >>>> if x<A[n/2][n/2] search in other 3 quadrants >>>> >>>> On Sat, Dec 25, 2010 at 8:25 AM, yq Zhang <zhangyunq...@gmail.com>wrote: >>>> >>>>> Suppose you have a matrix n*m. each column and row of the matrix is >>>>> already sorted. For example: >>>>> >>>>> 1,2,3 >>>>> 2,3,4 >>>>> 4,5,6 >>>>> >>>>> All 3 rows and 3 columns of above matrix are sorted. How to find a >>>>> specific number in the matrix? >>>>> The trivial O(nlogm) solution is to use binary search for all rows. I >>>>> am looking for better solution. >>>>> >>>>> Thanks >>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "Algorithm Geeks" group. >>>>> To post to this group, send email to algoge...@googlegroups.com. >>>>> To unsubscribe from this group, send email to >>>>> algogeeks+unsubscr...@googlegroups.com<algogeeks%2bunsubscr...@googlegroups.com> >>>>> . >>>>> For more options, visit this group at >>>>> http://groups.google.com/group/algogeeks?hl=en. >>>>> >>>>> >>>> >>>> >>>> -- >>>> Regards >>>> Aditya Kumar >>>> B-tech 3rd year >>>> Computer Science & Engg. >>>> MNNIT, Allahabad. >>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "Algorithm Geeks" group. >>>> To post to this group, send email to algoge...@googlegroups.com. >>>> To unsubscribe from this group, send email to >>>> algogeeks+unsubscr...@googlegroups.com<algogeeks%2bunsubscr...@googlegroups.com> >>>> . >>>> For more options, visit this group at >>>> http://groups.google.com/group/algogeeks?hl=en. >>>> >>> >>> >>> >>> -- >>> SOURABH JAKHAR,(CSE)(3 year) >>> ROOM NO 167 , >>> TILAK,HOSTEL >>> 'MNNIT ALLAHABAD >>> >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Algorithm Geeks" group. >>> To post to this group, send email to algoge...@googlegroups.com. >>> To unsubscribe from this group, send email to >>> algogeeks+unsubscr...@googlegroups.com<algogeeks%2bunsubscr...@googlegroups.com> >>> . >>> For more options, visit this group at >>> http://groups.google.com/group/algogeeks?hl=en. >>> >> >> >> >> -- >> Cheers >> Naveen Kumar >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Algorithm Geeks" group. >> To post to this group, send email to algoge...@googlegroups.com. >> To unsubscribe from this group, send email to >> algogeeks+unsubscr...@googlegroups.com<algogeeks%2bunsubscr...@googlegroups.com> >> . >> For more options, visit this group at >> http://groups.google.com/group/algogeeks?hl=en. >> > > > > -- > Regards, > Ankit Babbar > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To post to this group, send email to algoge...@googlegroups.com. > To unsubscribe from this group, send email to > algogeeks+unsubscr...@googlegroups.com<algogeeks%2bunsubscr...@googlegroups.com> > . > For more options, visit this group at > http://groups.google.com/group/algogeeks?hl=en. > -- Regards Aditya Kumar B-tech 3rd year Computer Science & Engg. MNNIT, Allahabad. -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to algoge...@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
