#662. Largest sum of a window of 2
Look at the sums of every 2 elements in a row and find the largest one (n ≥ 2).
### Input
The first line has n, the second line has n integers separated by spaces.
### Output
A number.
Examples
Input
5 -3 -6 -14 -4 3
Output
-1
Input
4 10 -20 9 14
Output
23
💡 You can solve it with Python, JavaScript or blocks. Read the input line by line with input(). Don't print a question (like input("Number: ")). Print exactly what the output asks for, nothing more.