import std;

void main () {
    auto A = readln.split.to!(int[]);
    auto T = readln.split.to!(long[]);
    auto ord = iota(A.length.to!int).array;
    ord.sort!((a, b) => T[a] < T[b]);

    long took = 0;
    long ans = 0;
    foreach (i; ord) {
        long rem = T[$ - 1] - took;
        long sol = rem / T[i];
        sol = min(sol, 1L * A[i]);

        ans += sol;
        took += sol * T[i];
    }

    writeln(ans);
}

void read (T...) (string S, ref T args) {
    import std.conv : to;
    import std.array : split;
    auto buf = S.split;
    foreach (i, ref arg; args) {
        arg = buf[i].to!(typeof(arg));
    }
}