yes, but using xor no need of ULL :)
2011/6/9 • » νιρυℓ « • <vipulmehta.1...@gmail.com>
> Sum wont overflow, ULL range will include sum.
>
> On Thu, Jun 9, 2011 at 3:52 PM, sunny agrawal <sunny816.i...@gmail.com>wrote:
>
>> sum can overflow....
>> Xor method can also be applied to Q1. no need of numbers to be sorted.
>>
>> 2011/6/9 • » νιρυℓ « • <vipulmehta.1...@gmail.com>
>>
>>> For 1.
>>> sum the numbers in the file, subtract it from sum of first 4 billion
>>> numbers.
>>>
>>>
>>> On Thu, Jun 9, 2011 at 3:44 PM, Navneet Gupta <navneetn...@gmail.com>wrote:
>>>
>>>> The answer to second question is simple. XORing all the elements
>>>> should do it for you.
>>>>
>>>>
>>>> On Thu, Jun 9, 2011 at 3:15 PM, Dumanshu <duman...@gmail.com> wrote:
>>>> > Q1. I have a file in which there are supposed to be 4 billion
>>>> > numbers,
>>>> > starting from 1 to 4,000,000,000 but unfortunately one number is
>>>> > missing,
>>>> > i.e there are only 3,999,999,999 numbers, I need to find the missing
>>>> > number.
>>>> >
>>>> >
>>>> > Q2. I have an array consisting of 2n+1 elements. n elements in it are
>>>> > married, i.e they occur twice in the array, however there is one
>>>> > element
>>>> > which only appears once in the array. I need to find that number in a
>>>> > single pass using constant memory. {assume all are positive numbers}
>>>> > Eg :- 3 4 1 3 1 7 2 2 4
>>>> > Ans:- 7
>>>> >
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>>>> >
>>>>
>>>>
>>>>
>>>> --
>>>> --Navneet
>>>>
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>>>>
>>>
>>>
>>> --
>>> Regards,
>>> Vipul
>>>
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>>
>>
>>
>> --
>> Sunny Aggrawal
>> B-Tech IV year,CSI
>> Indian Institute Of Technology,Roorkee
>>
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>
>
>
> --
> Regards,
> Vipul
>
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--
Sunny Aggrawal
B-Tech IV year,CSI
Indian Institute Of Technology,Roorkee
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