What is my mistake in this implementation of string and the if statements in c++?

#include<bits/stdc++.h>
using namespace std;

int main()
{
        long long int n;
        string s;
        cin>>n;   // 3
        cin.ignore();
        long long int siz = 2*n, Ascore = 0, Bscore = 0;
        cin>>s; // 101011
        for(int i = 0; i < siz; i++ )
        {

            if((i%2 == 0) && (s[i] == 1))
                Ascore++;
            if((i%2 == 1) && (s[i] == 1))
                Bscore++;
            if(abs(Ascore-Bscore) == 2)
                cout<<i+1<<"\n";
            if((i % 2 == siz-1) && (Ascore == Bscore))
                cout<<i+1<<"\n";


        }

}

I have given the value of n as 3 I have given the value of the string as 101011 The value of Ascore and Bscore is always zero and is not incrementing and nothing is being printed in the output.