#include<bits/stdc++.h>
#define deb(a) cout<<#a<<" is: "<<a<<endl;
#define dl() cout<<"--------------\n";
#define at(i) cout<<"at"<<i<<endl;
#define print(arr, n) for(int i=0;i<n;i++) cout<<arr[i]<<" ";
#define nl() cout<<"\n";
#define f first
#define s second

typedef long long ll;
typedef long double ld;
using namespace std;


main(){
    int t; cin>>t;
    while(t--){
        int n; cin>>n;
        string a, b; cin>>a>>b;
        if(a == b){
            cout<<0;
        }
        else{
            cout<<1;
        }
        nl();
    }
}