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

int main()
{
	int N;
	long long D;
	cin >> N >> D;
	vector<long long> x( N );
	for( int i = 0; i < N; i++ ) {
		cin >> x[i];
	}
	vector<long long> v( N );
	for( int i = 0; i < N; i++ ) {
		cin >> v[i];
	}

	const long long INF = INT64_MAX / 2;
	auto f = [&]( __int128_t t ) -> __int128_t
	{
		__int128_t res = 0;
		for( int i = 0; i < N; i++ ) {
			res += v[i] * t;
		}
		return res;
	};

	long long l = 0;
	long long r = INF;
	while( r - l > 1 ) {
		long long m = (l + r) / 2;
		if( f( m ) >= D ) r = m;
		else l = m;
	}
	long long ans = r;

	cout << ans << endl;
}