hmm may be because of [*result will fit into the 64-bit signed integer type
*.]
but i think it can be done optimally
consider if A = 1
B = 7 (taking an easier case)
so for 001,011,101,111 -> 1 = 4*1
for 010,110 -> 10 = 2*2
for 100 -> 100 = 1*4
something like that
so for each A,B we can calculate the final result in the order of no of bits
O(64)
On Fri, Jun 17, 2011 at 3:38 PM, sunny agrawal <sunny816.i...@gmail.com>
wrote:
>
> but limits of A and B are very large
> 10^15
> how is this possible
> am i missing something,
> like Max(B-A) = 10^6 or 10^7
>
> On Fri, Jun 17, 2011 at 3:30 PM, Arpit Sood <soodfi...@gmail.com> wrote:
>>
>> lol, i mean in linear time....
>>
>> On Fri, Jun 17, 2011 at 3:27 PM, sunny agrawal <sunny816.i...@gmail.com>
wrote:
>>>
>>> where n is ??
>>>
>>> On Fri, Jun 17, 2011 at 3:23 PM, Arpit Sood <soodfi...@gmail.com> wrote:
>>>>
>>>> i have got AC with O(n)
>>>>
>>>> On Fri, Jun 17, 2011 at 2:59 PM, sunny agrawal <sunny816.i...@gmail.com>
wrote:
>>>>>
>>>>> you need to try something better as limits of A and B are very large
:)
>>>>> you can not run a loop from A to B
>>>>>
>>>>> i have not tried it but the logic is there will be many nos which will
give the same value and we dont need to calculate for them all explicitply
:)
>>>>>
>>>>> On Fri, Jun 17, 2011 at 2:52 PM, KK <kunalkapadi...@gmail.com> wrote:
>>>>>>
>>>>>> To remove all digits left of the rightmost digit one in the binary
>>>>>> representation of some integer what we need to do is this:
>>>>>> ans = no & -no
>>>>>> and this is what is exactly asked in this problem of SPOJ:
>>>>>> www.spoj.pl/problems/MZVRK/
>>>>>>
>>>>>>
>>>>>> #include<iostream>
>>>>>> using namespace std;
>>>>>> int main()
>>>>>> {
>>>>>> unsigned long long int a, b, sum;
>>>>>> while(scanf("%lld%lld", &a, &b) != EOF)
>>>>>> {
>>>>>> sum = 0;
>>>>>> while(a != (b+1))
>>>>>> {
>>>>>> sum += (a & -a);
>>>>>> a++;
>>>>>> }
>>>>>> printf("%lld\n", sum);
>>>>>> }
>>>>>> return 0;
>>>>>> }
>>>>>>
>>>>>> Its giving TLE on some 10th case...
>>>>>>
>>>>>> --
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>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Sunny Aggrawal
>>>>> B-Tech IV year,CSI
>>>>> Indian Institute Of Technology,Roorkee
>>>>>
>>>>> --
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>>>>
>>>>
>>>>
>>>> --
>>>> Regards,
>>>> Arpit Sood
>>>>
>>>> --
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>>>
>>>
>>>
>>> --
>>> Sunny Aggrawal
>>> B-Tech IV year,CSI
>>> Indian Institute Of Technology,Roorkee
>>>
>>> --
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>>
>>
>>
>> --
>> Regards,
>> Arpit Sood
>>
>> --
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"Algorithm Geeks" group.
>> To post to this group, send email to algogeeks@googlegroups.com.
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>
>
>
> --
> Sunny Aggrawal
> B-Tech IV year,CSI
> Indian Institute Of Technology,Roorkee
>
--
Sunny Aggrawal
B-Tech IV year,CSI
Indian Institute Of Technology,Roorkee
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