Should the sequence always begin with “<”
Is the answer to the input ><> 0 or 2?
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I wish i could help you but its an ongoing contest. Just a small hint - Give stress on the word “Valid & Longest Prefix”. Combine both and you’ll solve it. 
Read the statement again, It is no where mentioned that expression will always begin with ‘<’
Answer is 0.
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Moreover, for any clarifications comment in question’s page only. For your question : http://www.codechef.com/MAY14/problems/COMPILER
If your question would be genuine, you would get answer there.
<>>>>>><> o/p for this input 9/2
sir how can we give string array of size 10^6 …plz help me
what is the answer of this <<> ?
@dileep2436, please look up tutorials of previous problems. There is a huge treasure out there. You will be able to find helpful hints.