/*------------------------------------------------------------------*/
/*------------------------- begin template -------------------------*/
/*------------------------------------------------------------------*/

// ref: tanakh <https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8>
// diff: using Parser
macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut parser = Parser::from_str($s);
        input_inner!{parser, $($r)*}
    };
    (parser = $parser:ident, $($r:tt)*) => {
        input_inner!{$parser, $($r)*}
    };
    (new_stdin_parser = $parser:ident, $($r:tt)*) => {
        let stdin = std::io::stdin();
        let reader = std::io::BufReader::new(stdin.lock());
        let mut $parser = Parser::new(reader);
        input_inner!{$parser, $($r)*}
    };
    ($($r:tt)*) => {
        input!{new_stdin_parser = parser, $($r)*}
    };
}

macro_rules! input_inner {
    ($parser:ident) => {};
    ($parser:ident, ) => {};
    ($parser:ident, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($parser, $t);
        input_inner!{$parser $($r)*}
    };
}

macro_rules! read_value {
    ($parser:ident, ( $($t:tt),* )) => {
        ( $(read_value!($parser, $t)),* )
    };
    ($parser:ident, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($parser, $t)).collect::<Vec<_>>()
    };
    ($parser:ident, chars) => {
        read_value!($parser, String).chars().collect::<Vec<char>>()
    };
    ($parser:ident, char_) => {
        read_value!($parser, String).chars().collect::<Vec<char>>()[0]
    };
    ($parser:ident, usize1) => {
        read_value!($parser, usize) - 1
    };
    ($parser:ident, i64_) => {
        $parser.fast_i64()
    };
    ($parser:ident, usize_) => {
        $parser.fast_i64() as usize
    };
    ($parser:ident, usize1_) => {
        ($parser.fast_i64() - 1) as usize
    };
    ($parser:ident, $t:ty) => {
        $parser.next::<$t>().expect("Parse error")
    };
}

use std::io;
use std::io::BufRead;
use std::str;

// ref: tatsuya6502 <https://qiita.com/tatsuya6502/items/cd448486f7ef7b5b8c7e>
// ref: wariuni <https://qiita.com/tatsuya6502/items/cd448486f7ef7b5b8c7e#comment-7040a5ae96305e884eb9>
// diff: using std::io::BufRead::fill_buf()
pub struct Parser<R> {
    pub reader: R,
    buf: Vec<u8>,
    pos: usize,
}

impl Parser<io::Empty> {
    pub fn from_str(s: &str) -> Parser<io::Empty> {
        Parser {
            reader: io::empty(),
            buf: s.as_bytes().to_vec(),
            pos: 0,
        }
    }
}

impl<R: BufRead> Parser<R> {
    pub fn new(reader: R) -> Parser<R> {
        Parser {
            reader: reader,
            buf: vec![],
            pos: 0,
        }
    }
    pub fn update_buf(&mut self) {
        self.buf.clear();
        self.pos = 0;
        loop {
            let (len, complete) = {
                let buf2 = self.reader.fill_buf().unwrap();
                self.buf.extend_from_slice(buf2);
                let len = buf2.len();
                (len, buf2[len - 1] <= 0x20)
            };
            self.reader.consume(len);
            if complete {
                break;
            }
        }
    }
    pub fn next<T: str::FromStr>(&mut self) -> Result<T, T::Err> {
        loop {
            let mut begin = self.pos;
            while begin < self.buf.len() && (self.buf[begin] <= 0x20) {
                begin += 1;
            }
            let mut end = begin;
            while end < self.buf.len() && (self.buf[end] > 0x20) {
                end += 1;
            }
            if begin != self.buf.len() {
                self.pos = end;
                return unsafe { str::from_utf8_unchecked(&self.buf[begin..end]) }.parse::<T>();
            } else {
                self.update_buf();
            }
        }
    }
    pub fn fast_i64(&mut self) -> i64 {
        loop {
            let mut begin = self.pos;
            while begin < self.buf.len() && (self.buf[begin] <= 0x20) {
                begin += 1;
            }
            if begin == self.buf.len() {
                self.update_buf();
                continue;
            }
            let mut res = 0;
            let (is_positive, mut end) = match self.buf[begin] {
                b'+' => (true, begin + 1),
                b'-' => (false, begin + 1),
                _ => (true, begin),
            };
            while end < self.buf.len() && (self.buf[end] > 0x20) {
                res = res * 10 + (self.buf[end] as i64 - '0' as i64);
                end += 1;
            }
            if begin != self.buf.len() {
                self.pos = end;
                return if is_positive { res } else { -res };
            } else {
                self.update_buf();
            }
        }
    }
}

#[allow(unused_imports)]
use std::cmp::*;

fn main() {
    input! {
        new_stdin_parser = parser,
    }
    let res = solve(&mut parser);
    print!("{}", res);
}

/*------------------------------------------------------------------*/
/*-------------------------- end template --------------------------*/
/*------------------------------------------------------------------*/

use std::fmt::Write;
fn solve<R: BufRead>(parser: &mut Parser<R>) -> String {
    let mut buf = String::new();
    input! {
        parser = parser,
        n: usize,
        xs: [usize; 3],
        ys: [usize; 3],
    }
    let g_min = min(xs[0], ys[0]);
    let g_max = max(xs[0], ys[0]);
    let s_min = min(xs[1], ys[1]);
    let s_max = max(xs[1], ys[1]);
    let b_min = min(xs[2], ys[2]);
    let b_max = max(xs[2], ys[2]);
    let mins = [g_min, s_min, b_min];
    let maxs = [g_max, s_max, b_max];

    let mut left = vec![];
    let mut right = vec![];
    for i in 0..3 {
        if xs[i] < ys[i] {
            left.push(i);
        }
        if xs[i] > ys[i] {
            right.push(i);
        }
    }

    if left.len() == 0 || right.len() == 0 {
        let mut res = 0;
        for b in 0..n + 1 {
            for s in 0..n + 1 {
                if b + s > n {
                    break;
                }
                let g = n - s - b;
                let mut gain = 0;
                let ts = vec![g, s, b];
                for i in 0..3 {
                    gain += ts[i] / mins[i] * maxs[i];
                    gain += ts[i] % mins[i];
                }
                res = max(res, gain);
            }
        }
        writeln!(buf, "{}", res);
    } else {
        let mid = if left.len() == 1 {
            n / mins[left[0]] * maxs[left[0]] + n % mins[left[0]]
        } else if left.len() == 2 {
            let (large_i, small_i) =
                if maxs[left[0]] * mins[left[1]] >= maxs[left[1]] * mins[left[0]] {
                    (left[0], left[1])
                } else {
                    (left[1], left[0])
                };
            let mut res = 0;
            let max_large_n = n / mins[large_i];
            let min_large_n = max(0, max_large_n as i64 - 7000) as usize;
            for large_n in min_large_n..max_large_n + 1 {
                let t_large = large_n * mins[large_i];
                let t_small = n - t_large;
                let s_large = t_large / mins[large_i] * maxs[large_i] + t_large % mins[large_i];
                let s_small = t_small / mins[small_i] * maxs[small_i] + t_small % mins[small_i];
                res = max(res, s_large + s_small);
            }
            res
        } else {
            panic!();
        };
        let n = mid;
        let left = right;
        let res = if left.len() == 1 {
            n / mins[left[0]] * maxs[left[0]] + n % mins[left[0]]
        } else if left.len() == 2 {
            let (large_i, small_i) =
                if maxs[left[0]] * mins[left[1]] >= maxs[left[1]] * mins[left[0]] {
                    (left[0], left[1])
                } else {
                    (left[1], left[0])
                };
            let mut res = 0;
            let max_large_n = n / mins[large_i];
            let min_large_n = max(0, max_large_n as i64 - 7000) as usize;
            for large_n in min_large_n..max_large_n + 1 {
                let t_large = large_n * mins[large_i];
                let t_small = n - t_large;
                let s_large = t_large / mins[large_i] * maxs[large_i] + t_large % mins[large_i];
                let s_small = t_small / mins[small_i] * maxs[small_i] + t_small % mins[small_i];
                res = max(res, s_large + s_small);
            }
            res
        } else {
            panic!();
        };
        writeln!(buf, "{}", res);
    }
    buf
}


Measured memory_bytes: 4352