Easyarraysio
First Plus Last
Time limit 2 s · Memory 64 MBAcceptance: —Solved by: 0
Statement
The first line contains n, the second line contains n integers. Print the sum of the first and the last element. If n = 1, the single element is taken twice.
Examples
Example 1
Input
4 1 2 3 4
Output
5
Example 2
Input
1 7
Output
14
Constraints
- 1 ≤ n ≤ 10^5
- -10^9 ≤ a_i ≤ 10^9