This problem from Viet Nam spoj .

Link of this problem : http://vn.spoj.com/problems/PYRAMID2/;

In short : You have a string s only include 2 char '>' or '<'. After 1 second, with every pair like that "><" will become to "<>"

Find the time this operation will end .

Thanks for your help !!!

Limit : Length of the string s <= 1e6 (1000000);

Example : 4

<><>

Output : 1 . Explain this test : After 0 second : <><>

After 1 second : <<>>