Can [this problem](http://codeforces.net/contest/220/problem/B) problem be solved using segment tree. If yes can anyone can tell how to build Seg tree.↵
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During combining two segments how do i check for mid and (mid+1)th element in merged segement.↵
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During combining two segments how do i check for mid and (mid+1)th element in merged segement.↵
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