Hiii!! I have some idea about the solution. Please notify me if i am
wrong....
a= [ 4,3,5 ] and b= [ 3,5,4 ]
diff=0;
for (i=0; i<n;i++)
{ diff= diff+a[i]-b[i];
}
if diff == 0
print: permutation
else
print: not permutation
On 20 May 2012 07:2 0, Dave <dave_and_da...@juno.com> wrote:
> @Harshit: These are a few unanswered questions that came to mind when I
> read your solution attempt: What do you do with negative elements? What is
> the -12th prime number? How do you deal with overflow in the cases where
> you have a lot of large prime numbers and the product exceeds your native
> data types?
>
> Dave
>
> On Saturday, May 19, 2012 2:29:52 PM UTC-5, harshit pahuja wrote:
>
>> given 2 unsorted integer arrays a and b of equal size. Determine if b is
>> a permutation of a. Can this be done in O(n) time and O(1) space ?
>>
>>
>>
>>
>> please help me with my solution
>>
>>
>> suppose a -- 3 5 4
>> b -- 4 3 5
>>
>> now we replace a[i] with a[i]..th prime number and b with b[i] .. th
>> prime number
>>
>> now array a becomes 5 11 7
>> array b becomes 7 5 11
>>
>> now we take product of elements of array a and do the same with array b
>> elements
>> if product is equal then b is a permutation of a
>>
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