import re
import sys


content = input()
pattern = r'^(\d+)$'
result = re.match(pattern, content)

if not result:
    sys.exit("format error.")

n = int(content)

if not (1 <= n and n <= 10**5):
    sys.exit("N")


content = input()
pattern = r'^(-?\d+)( (-?\d+))*$'
result = re.match(pattern, content)

if not result:
    sys.exit("format error.")

a = list(map(int, content.split()))

if len(a) != n:
    sys.exit("A")

for i in range(n):
    if not (-(10**18) <= a[i] and a[i] <= 10**18):
        sys.exit("A")


dp = {0 : 0}

def get_nimber(a):
    global dp

    if a < 0:
        return 100
    
    if a in dp:
        return dp[a]
    
    a0 = 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:
            dp[a0] = i
            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)