#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define f first
#define s second
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()

const int inf = 1e9;
const ll infll = 1e18;
const int M = 1000000007;
const int N = 2e5;

void testCase(){
	int n;
	string s1, s2;
	cin >> n >> s1 >> s2;
	puts(s1 == s2?"0":"1");
	
}

int main(){
	int T = 1;
	scanf("%d", &T);
	while(T--){
		testCase();
	} 
}