N = int(input())
A = list(map(int, input().split()))
cnt1, cnt2 = 0, 0
for a in A:
    if a < 0:
        if a % 2:
            cnt1 += 1
        else:
            cnt2 += 1
if cnt1 or cnt2:
    if cnt1 % 2:
        print(1)
    elif cnt2 % 2 == 0:
        print(1)
    else:
        print(2)
    exit()

    
M = 65
dp = [-1] * M
dp[0] = 0
for i in range(M):
    S = set()
    for j in range(10):
        if (i >> j) & 1:
            S.add(dp[j])
    now = 0
    while now in S:
        now += 1
    dp[i] = now
    
ans = 0
for i in range(N):
    S = set()
    for j in range(M):
        if (A[i] >> j) & 1:
            S.add(dp[j])
    now = 0
    while now in S:
        now += 1
    ans ^= now
    
print(1) if ans else print(2)