import sys
sys.setrecursionlimit(1000000000)

#
# Solution Template for Sunday Drive II
# 
# Australian Informatics Olympiad 2026
# 
# This file is provided to assist with reading of input and writing of output
# for the problem. You may modify this file however you wish, or
# you may choose not to use this file at all.
#

# N is the length of the street.
N = 0
# V contains the volume limits. The list starts from 0.
V = []

# Read the street length and volume limits.
N = int(input().strip())
V = list(map(int, input().strip().split()))

# TODO: Compute the maximum enjoyment and store it in answer.
answer = 0

# Write the answer.
print(answer)