#760. The two closest numbers
Find the smallest absolute difference between two elements at different positions (n ≥ 2).
### Input
The first line has n, the second line has n integers separated by spaces.
### Output
A number.
Examples
Input
5 -80 73 -100 -42 -57
Output
15
Input
2 -10 -44
Output
34
💡 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.