#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using ll = long long;
#define rep(i,n) for(int i=0;i<(int)(n);i++)

int main(){
	int n;
	cin>>n;
	vector<ll> a(n);
	rep(i,n) cin>>a.at(i);
	// A034798
	vector<int> dp={0, 1, 0, 2, 1, 1, 2, 2, 0, 1, 0, 3, 1, 1, 3, 3, 0, 2, 0, 2, 2, 2, 2, 2, 0, 3, 0, 3, 3, 3, 3, 3, 0, 2, 0, 2, 2, 2, 2, 2, 0, 3, 0, 3, 3, 3, 3, 3, 0, 2, 0, 2, 2, 2, 2, 2, 0, 3, 0, 3, 3, 3, 3, 3, 0, 1, 0, 3, 1, 1, 3, 3, 0, 1, 0, 3, 1, 1, 3, 3, 0, 3, 0, 3, 3, 3, 3, 3, 0, 3, 0, 3, 3, 3, 3, 3, 0, 3, 0, 3};
	int d=0;
	int smx=0;
	rep(i,n){
		if(a.at(i)<0){
			d++;
			continue;
		}
		set<int> st;
		rep(j,65){
			if((a.at(i)>>j)&1) st.insert(dp.at(j));
		}
		int mx=0;
		while(st.count(mx)) mx++;
		smx^=mx;
	}
	d%=2;
	if(d&&(smx==0)){
		cout<<"1\n";
		return 0;
	}
	if(smx) cout<<"1\n";
	else cout<<"2\n";
}