from random import randint
A = [randint(1, 1000) for i in range(1000)]
Max = 0
for i in range(len(A)):
    for j in range(i + 11, len(A)):
        if (A[i] + A[j]) % (2 * 567) == 0:
            Max = max(Max, A[i] + A[j])
print(Max)

m = [-10**10] * (567 * 2)
ans = -10**10
q = A[:10]
for i in range(10, len(A)):
    x = A[i]
    ost = 0 if x % (567 * 2) == 0 else (567 * 2) - x % (567 * 2)
    ans = max(ans, x + m[ost])
    m[q[0] % (567 * 2)] = max(m[q[0] % (567 * 2)], q[0])
    q.append(x)
    q.pop(0)
print(ans)