Junior C

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

int cnt[105];

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);


    int t , n;
    string s;
    cin >> t;
    int ans = 0;
    while(t--){
        cin >> n;
        cin >> s;
        int x = 0 , y = 0;
        for(int i = 0; i < s.size(); i++){
            if(s[i] == '1')
                x++;
            else
                y++;
        }
        cout << min(x , y + 1) << '\n';
    }
}