#pragma GCC optimize("Ofast") #include using namespace std; typedef long long int ll; typedef unsigned long long int ull; mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count()); ll myRand(ll B) { return (ull)rng() % B; } int main() { ios::sync_with_stdio(false); cin.tie(nullptr); int n; cin >> n; vector a(n), b(n); for (int i = 0; i < n; i++) { cin >> a[i]; } for (int i = 0; i < n; i++) { cin >> b[i]; } int res = 0; for (int i = 0; i < n; i++) { res += (a[i] <= b[i]); } cout << res << endl; }