n = int(input())
try:
    alst = [int(input()) for _ in range(n)]
    a1 = alst[0] + alst[1]
    a2 = alst[1] + alst[2]
    a3 = alst[2] + alst[0]
    lst = [a1, a2, a3]
    lst.sort()
    print(lst[1])
except ValueError:
    print('"assert"')