Keyboard is broken

#include <iostream>
#include <vector>
#include <string>
#include <cstring>
#include <sstream>
#include <algorithm>

using namespace std;

istream & operator >> (istream & in, vector<int> & v)
{
    string str;
    getline(in,str);
    stringstream stream(str);
    int tmp;
    while(stream >> tmp)
        v.push_back(tmp);
    return in;
}
ostream & operator << (ostream & out, vector<int> const & v)
{
    for(int el: v)
        out << el << ' ';
    return out;
}
int main()
{
    int n,bi,j,ud,d,i,OMEGAHEAD,FOURHEAD,counter,t,e,l,y,b;
    vector<int> a,N,a1,B;
    cin>> N;
    cin >>a;
    cin >> B;
    cin >> a1;
    b=B[0];
    n=N[0];
    for (i=0;i<n;++i)
    {
        if (a[i]<count(a1.begin(),a1.end(),i+1)) cout << "YES" <<endl;
        else cout<<"NO"<<endl;
    }

    return 0;
}