#include <bits/stdc++.h>

using namespace std;

void tc() {
    int n, s1, s2;
    cin >> n >> s1 >> s2;

    vector<int> a(s1);
    for (int i = 0; i < s1; i++) {
        cin >> a[i];
    }


    vector<int> b(s2);
    for (int i = 0; i < s2; i++)cin >> b[i];

    for (int i = s2 - 1; i >= 0; i--)
        a.push_back(b[i]);

    b.clear();
    int z = -1;
    for (int i = 0; i < a.size(); i++) {
        if (a[i] == 0)z = i;
        else if (z != -1)b.push_back(a[i]);
    }
    a.resize(z);
    std::reverse(a.begin(), a.end());

    auto lis = [](vector<int> a) -> int {
        vector<int> v;
        for (int i = 0; i < a.size(); i++) {
            if (v.empty() || v.back() < a[i])
                v.push_back(a[i]);
            else
                v[std::lower_bound(v.begin(), v.end(), a[i]) - v.begin()] = a[i];
        }
        return v.size();
    };

    cout << lis(a) + lis(b) << '\n';
}

signed main() {
    ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    int t = 1;

//    cin >> t;

    while (t--) {
        tc();
    }

    return 0;
}