const b64str = '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';
let imports = {};
let wasm;
//const bytes = Buffer.from(b64str, 'base64');
const bytes = Uint8Array.from([...atob(b64str)].map(s=>s.charCodeAt(0)));
const wasmModule = new WebAssembly.Module(bytes);
const wasmInstance = new WebAssembly.Instance(wasmModule, imports);
wasm = wasmInstance.exports;

let l = require("fs").readFileSync("/dev/stdin", "utf8").trim().split("\n");
let n = BigInt(l[0]);
let [a1, b1] = l[1].split(" ").map(s => BigInt(s));
let [a2, b2] = l[2].split(" ").map(s => BigInt(s));
let [a3, b3] = l[3].split(" ").map(s => BigInt(s));

console.log(wasm.solve(n,a1,b1,a2,b2,a3,b3).toString());

/*

// WebAssembly Source Code (Rust):

use wasm_bindgen::prelude::*;

#[wasm_bindgen]
pub fn solve(n: i64, a1: i64, b1: i64, a2: i64, b2: i64, a3: i64, b3: i64) -> i64 {
    co_solve(n as i64, [(a1, b1), (a2, b2), (a3, b3)])
        .max(co_solve(n as i64, [(a2, b2), (a3, b3), (a1, b1)]))
        .max(co_solve(n as i64, [(a3, b3), (a1, b1), (a2, b2)]))
}

fn co_solve(n: i64, ab: [(i64, i64); 3]) -> i64 {
    let [(ap, bp), (aq, bq), (ar, br)] = ab;
    if ap == 0 {
        return 0;
    }
    // a_p_inv = ceil(2^62 / a_p) = floor((2^62 - 1) / a_p) + 1
    let apinv = ((1i64 << 62) - 1) / ap + 1;
    let (imax, jmax) = (ap * bq, ap * br);
    let (mut r, mut i, mut di) = (0, 0, n);
    while i < imax && di >= 0 {
        let (mut j, mut dj) = (0, di);
        while j < jmax && dj >= 0 {
            // 準定数を除数とする除算の定数倍高速化
            // 0 < a_p <= 10^5, 0 <= d_j <= n <= 10^13 < 2^62/10^5 <= 2^62 / a_p <= ceil(2^62 / a_p) = a_p_inv < ((2^62 / a_p) + 1)
            // quot = floor((n - (i * a_q + j * a_r)) / a_p) = floor(d / a_p) = floor((d * 4) * ceil(2^62 / a_p) / 2^64) - (0 または 1)
            let qsim = ((((dj * 4) as u128) * (apinv as u128)) >> 64) as i64;
            let quot = qsim - i64::from(qsim * ap > dj);
            r.chmax(quot * bp + i + j);
            dj -= ar;
            j += br;
        }
        di -= aq;
        i += bq;
    }
    r
}

trait Change {
    fn chmax(&mut self, x: Self);
    fn chmin(&mut self, x: Self);
}
impl<T: PartialOrd> Change for T {
    fn chmax(&mut self, x: T) {
        if *self < x {
            *self = x;
        }
    }
    fn chmin(&mut self, x: T) {
        if *self > x {
            *self = x;
        }
    }
}


*/