Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

Troubleshooting
Research
Professional Opinions
Ask a Question
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE

troubleshooting Question

Searching duplicates from a huge data set

Avatar of HukkaHua
HukkaHua asked on
CC++Algorithms
28 Comments1 Solution447 ViewsLast Modified:
Hi ,
     This question is from one of the popular books .

Given a sequential  file containing 4,300,000,000 integers, how can you find one that appears at least once ?
a) How to solve it with ample quantities of memory
b) External scratch files are allowed but only few hundred bytes of main memory is available.

I am aware of the bit map technique, where we map each integer to a bit and so on.
Any solution to the above problem is greatly appreciated.

Thanks,
H
ASKER CERTIFIED SOLUTION
Avatar of itsmeandnobodyelse
itsmeandnobodyelseFlag of Germany image

Our community of experts have been thoroughly vetted for their expertise and industry experience.

Commented:
This problem has been solved!
Unlock 1 Answer and 28 Comments.
See Answers