I was solving this question: http://codeforces.com/contest/479/problem/B
The output specification states that: "Note that in the process of performing operations the heights of some towers can become equal to zero."
Consider the second test case:
2 2 4
We can arrive at a better solution than the one given by doing the following operations:
Now the towers are: 4 4 with instability 0 (as tower 1 no longer exists). But the answer states minimum as 1.
Can somebody please help me understand what I am misunderstanding here?