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

dp = {}

def get_nimber(a):
    if a < 0:
        return 100
    
    if a in dp:
        return dp[a]
    
    ex = [0] * 10
    for i in range(60):
        if a % 2 == 1:
            g = get_nimber(i)
            ex[g] = 1
        a //= 2
    
    for i in range(10):
        if ex[i] == 0:
            return i
    
    return -1

res = 0

for i in range(n):
    g = get_nimber(a[i])
    res ^= g

print(2 if res == 0 else 1)