class Solution
{
    static void Main(string[] args)
    {
        int n = int.Parse(Console.ReadLine()); // the number of temperatures to analyse
        string[] inputs = Console.ReadLine().Split(' ');
        //int low = 100000; // whats this?
        
        int low = inputs[0];
        for(int i=0; i<inputs.length; i++){
            int t = int.Parse(inputs[i]);
            if (Math.Abs(t) < low)
                low = t;
        }
        return low;
        Console.WriteLine(low);
    }
}