'''
Given the participants' score sheet for your University Sports Day, you are required to find the runner-up score. You are given n scores. Store them in a list and find the score of the runner-up.

Input Format

The first line contains n. The second line contains an array A[] of n integers each separated by a space.

Constraints

	2<=n<=10
	-100 <= A[i] <= 100

Output Format

Print the runner-up score.
'''

if __name__=='__main__':
    n=int(input())
    #Provides a list of Scores form the Input
    arr=list(map(int,input().split()))
    #arr1 is a unique sorted list of the Scores
    arr1=sorted(list(set(arr)))
    print(arr1[-2])