2241C　Codeforces Round 1107 (Div. 3)

#include<iostream>
using namespace std;
int main()
{
    int t;
    cin>>t;
    while(t--)
    {
        int n;string s;
        cin>>n>>s;
        int ans=0;
        for(int i=1;i<n;i++)
        {
            if(s[i]!=s[i-1])ans++;
        }
        if(ans==1)cout<<2<<endl;
        else cout<<1<<endl;
    }
    return 0;
}