n = int(input())
assert_list = list(map(int,input().split()))

res = 0
if len(assert_list) == 3:
    res = '"assert"'
else:
    added_list = [int(input()) for i in range(2)]
    added_list.insert(0, assert_list[0])
    a, b, c = added_list
    res_list = [a + b, b + c, c + a]
    sorted_res_list = sorted(res_list)
    res = sorted_res_list[1]
    
print(res)