Description: In this problem, you are given n integers. Your task is to find the maximal value of them.
Input may contains several test cases. For each test case, the first line contains an integer, indicating n (1<=n<=10,000).In the second line there are n integers, which absolute values are less than 10^9.A case with n=0 indicates the end of input, which should not be processed.
For each test case, you should output the maximal value in a single line.
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1380.cpp
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