Given an array of integers, your task is to find the smallest negative number. If there are no negative numbers in the array, output NO.
The first line contains the integer (1 \leq n \leq 100), representing the number of elements in the array. The second line contains integers, each with an absolute value not exceeding .
Print the smallest negative number, or NO if there are no negative numbers in the array.
Example 1
Example 2