#include "bits/stdc++.h"
using namespace std;
#define int long long
#define REP(i, n) for (int i = 0; i < (int)n; ++i)
#define RREP(i, n) for (int i = (int)n - 1; i >= 0; --i)
#define FOR(i, s, n) for (int i = s; i < (int)n; ++i)
#define RFOR(i, s, n) for (int i = (int)n - 1; i >= s; --i)
#define ALL(a) a.begin(), a.end()
#define IN(a, x, b) (a <= x && x < b)
template<class T>inline void out(T t){cout << t << "\n";}
template<class T,class... Ts>inline void out(T t,Ts... ts){cout << t << " ";out(ts...);}
template<class T>inline bool CHMIN(T&a,T b){if(a > b){a = b;return true;}return false;}
template<class T>inline bool CHMAX(T&a,T b){if(a < b){a = b;return true;}return false;}
constexpr int INF = 1e18;



signed main(){
    int N, D;
    cin >> N >> D;
    vector<int>x(N), v(N);
    REP(i, N) {
        cin >> x[i];
    }
    REP(i, N) {
        cin >> v[i];
    }
    auto f =[&](int x){
        int ret = 0;
        REP(i, N) {
            ret += v[i] * x;
        }
        return ret >= D;
    };
    int l = -1, r = 1e11 + 1;
    while(r - l > 1){
        int c = (l + r) / 2;
        if(f(c)) r = c;
        else l = c;
    }
    cout << r << endl;
}