#include <iostream>
#include <string>
using namespace std;
int main() {
int n, odd=0, even=0, res;
string num;
cin>>n>>num;
for(int i=0;i<n;i++){
if((num[i]-'0')%2==0)
even++;
else
odd++;
}
if(even>odd)
res=0;
else if(even<odd)
res=1;
else
res=-1;
cout<<res;
return 0;
}
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