#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define all(x) x.begin(), x.end()
#define FAST ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL)
#define vec(d) vector<d>
#define cin(x) for(auto &i:x)cin>>i;
#define el endl
#define pb push_back
void solve()
{
   int n;
   cin >>n;
   string s,c;
   cin>>s>>c;
   cout<<(s!=c)<<el;
}
int main()
{


    FAST;

    int t;
    cin>>t;
    while(t--)
    {
        solve();
    }



}