#include <cassert>
#include <iostream>
#include <vector>
using namespace std;

int main() {
    int n;
    cin >> n;
    vector<int> a(n), b(n);
    for (int i = 0; i < n; ++i) cin >> a[i];
    for (int i = 0; i < n; ++i) cin >> b[i];

    assert(1 <= n && n <= 100);
    for (int i = 0; i < n; ++i) {
        assert(1 <= a[i] && a[i] <= 100);
        assert(1 <= b[i] && b[i] <= 100);
    }

    int ans = 0;
    for (int i = 0; i < n; ++i) {
        if (a[i] > b[i]) {
            continue;
        }
        ans += 1;
    }
    cout << ans << endl;
    return 0;
}