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

int main() {
    // your code goes here
    int testCases;
    cin>>testCases;

    while(testCases-- >0){
        int bitSize;
        cin>>bitSize;

        string S;
        cin>>S;

        int numberOfZeroes=0;
        int numberOfOnes=0;
        for(int i=0;i<S.length();i++){
            if(S[i]=='0'){
                numberOfZeroes++;
            }else{
                numberOfOnes++;
            }
        }

        if(S.length()%2==0){
            if(numberOfOnes==numberOfZeroes){
                cout<<"YES"<<endl;
            }else if(numberOfZeroes%2==0 && numberOfOnes%2==0){
                cout<<"YES"<<endl;
            }else{
                cout<<"NO"<<endl;
            }
        }else{
            cout<<"YES"<<endl;
        }


    }
    return 0;
}