Sequence a_i is called unimodal if there exists such index that a_1 < a_2 < \ldots < a_p and a_p > a_{p+1} > \ldots > a_n. Value a_p is maximum in this sequence. You must find this value.
The first line contains the size of array n~(n \le 10^6). The next line contains positive integers that represent a unimodal sequence. Numbers in array do not exceed 10^9.
Print the maximum element in the unimodal sequence.
Example 1
Example 2