import fileinput
import itertools
import sys

N = 25

numbers = []
for line in fileinput.input():
    numbers.append(int(line))

for i in range(N, len(numbers)):
    target = 25918798
    #target=127
    for j in range(i - N,i):
        for k in range(j+ 1, i):
            nn = numbers[j:k]
            if sum(nn) == target:
                print(max(nn) + min(nn))
                sys.exit(0)