#include<bits/stdc++.h>

using namespace std;

typedef int ll;
typedef vector<ll> line;

int main() {

    int n, m, w;
    cin >> n >> m >> w;
    multiset<int> unused;
    multiset<int> used;
    line note(m);
    for (int i = 0; i < n; ++i) {
        int x;
        cin >> x;
        unused.insert(x);
    }
    for (auto &y : note) {
        cin >> y;
    }
    int ans = 0;
    for (int i = 0; i < m; ++i) {
        if (used.count(note[i]) != 0) {
            ans++;
            continue;
        }
        auto bot = unused.upper_bound(note[i]);
        if (bot == unused.begin()) {
            cerr << "1 break;\n";
            break;
        }
        bot--;
        int cnt = *bot;

        if (w < note[i] - cnt) {
            cerr << "2 break\n";
            break;
        }

        unused.erase(bot);
        used.insert(note[i]);
        w -= note[i] - cnt;
        ans++;
    }
    cout << ans << "\n";
    return 0;
}