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4303: INTERCALC

内存限制：256 MB 时间限制：2 S
题面：传统 评测方式：文本比较 上传者：
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题目描述

time limit per test
2 seconds
memory limit per test
64 megabytes
input
standard input
output
standard output
DO YOU EXPECT ME TO FIND THIS OUT?
WHAT base AND/XOR LANGUAGE INCLUDES string?
DON'T BYTE OF MORE THAN YOU CAN CHEW
YOU CAN ONLY DISTORT THE LARGEST OF MATHEMATICS SO FAR
SAYING "ABRACADABRA" WITHOUT A MAGIC AND WON'T DO YOU ANY GOOD
THE LAST STACK RUPTURES. ALL DIE. OH, THE EMBARRASSMENT!
I HAVE NO ARRAY AND I MUST SCREAM
ELEMENTS MAY NOT BE STORED IN WEST HYPERSPACE
Input
The first line of input data contains a single integer n (1≤n≤10).
The second line of input data contains n space-separated integers ai (1≤ai≤11).
Output
Output a single integer.
Example
Input
4
2 5 3 1
Output
4

输入样例 复制

输出样例 复制

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