#include <bits/stdc++.h>
#define IOS ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define i64 long long
#define endl '\n'
#define lb(x) ((x) & (-x))
using namespace std;
const i64 mod = 1e15+7;
const int maxn = 1e3+10;

signed main()
{
    IOS;
    int t; cin >> t;
    while(t--)
    {
        int k; cin >> k;
        string s; cin >> s;
        int n,m; cin >> n >> m;
        for(int i = 1; i <= m; ++i)
        {
            int x,y; cin >> x >> y;
        }
        int t = m-(n-1);
        char c = s[t%k];
        if(c == '1') cout << 2 << endl;
        else cout << 1 << endl;
    }
    return 0;
}