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


void magic() {  
    int n; cin>>n;
    string s, t; cin>>s>>t;
    if(s == t) cout<<0<<endl;
    else cout<<1<<endl;
}


int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    //freopen("intput.in", "r", stdin); // INPUT
    // freopen("road.out", "w", stdout); // OUTPUT JUST IN CASE

    int tt = 1; cin>>tt;
    while (tt--)
        magic();
}