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PERLA CONTEST 7 DIV2_2

Two biggest

Array of n integers is given. Find the sum of two biggest elements in array.

Input

First line contains number n (n100). Next line contains n integers, each of them is no more than 100 by absolute value.

Output

Print the sum of two biggest elements in array.

Time limit 1 second
Memory limit 128 MiB
Input example #1
5
1 5 2 6 3
Output example #1
11
Input example #2
4
1 4 4 1
Output example #2
8