import sys
input = sys.stdin.readline

N=int(input())
A=list(map(int,input().split()))

if N>=16:
    print(2**16-1)
    exit()

DP=[0]*(1<<N)

for i in range(1<<N):
    now=DP[i]
    for j in range(N):
        if i & (1<<j) != 0:
            continue

        k=A[j]
        while k%2==0:
            k//=2

        for b in range(16):
            u=now
            
            for t in range(16):
                if k & (1<<t) != 0:
                    u |= 1<< ((b+t)%16)

            DP[i|(1<<j)]=max(DP[i|(1<<j)],u)

print(DP[-1])