/**
 * 
 */

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

using i8   = int8_t;
using u8   = uint8_t;
using i16  = int16_t;
using u16  = uint16_t;
using i32  = int32_t;
using u32  = uint32_t;
using i64  = int64_t;
using u64  = uint64_t;
using i128 = __int128_t;
using u128 = __uint128_t;

using f32  = float;
using f64  = double;
using f80  = __float80;
using f128 = __float128;
// }}}

constexpr i64 INF = 1'010'000'000'000'000'000LL;

constexpr i64 MOD = 1'000'000'007LL;

constexpr f64 EPS = 1e-12;

constexpr f64 PI = 3.14159265358979323846;

// {{{ util
#define FOR(i, start, end) for(i64 i = (start), i##_end=(end); i < i##_end; ++i)
#define REP(i, n) FOR(i, 0, n)

#define ALL(f,c,...) (([&](decltype((c)) cccc) { return (f)(begin(cccc), end(cccc), ## __VA_ARGS__); })(c))
#define SLICE(f,c,l,r,...) (([&](decltype((c)) cccc, decltype((l)) llll, decltype((r)) rrrr) {\
    auto iiii = llll <= rrrr ? begin(cccc)+llll : end(cccc);\
    auto jjjj = llll <= rrrr ? begin(cccc)+rrrr : end(cccc);\
    return (f)(iiii, jjjj, ## __VA_ARGS__);\
})(c,l,r))

#define GENERIC(f) ([](auto&&... args) -> decltype(auto) { return (f)(forward<decltype(args)>(args)...); })

template<typename C>
i64 SIZE(const C& c) { return static_cast<i64>(c.size()); }

template<typename T, size_t N>
i64 SIZE(const T (&)[N]) { return static_cast<i64>(N); }

bool is_odd (i64 x) { return x % 2 != 0; }
bool is_even(i64 x) { return x % 2 == 0; }

template<typename T> i64 cmp(T x, T y) { return (y<x) - (x<y); }
template<typename T> i64 sgn(T x) { return cmp(x, T(0)); }

// Haskell の divMod と同じ
pair<i64,i64> divmod(i64 a, i64 b) {
    i64 q = a / b;
    i64 r = a % b;
    if((b>0 && r<0) || (b<0 && r>0)) {
        --q;
        r += b;
    }
    return {q,r};
}

i64 div_ceil(i64 a, i64 b) {
    i64 q = a / b;
    i64 r = a % b;
    if((b>0 && r>0) || (b<0 && r<0))
        ++q;
    return q;
}

i64 div_floor(i64 a, i64 b) {
    return divmod(a,b).first;
}

i64 modulo(i64 a, i64 b) {
    return divmod(a,b).second;
}

bool feq(f64 x, f64 y, f64 eps=EPS) {
    return fabs(x-y) < eps;
}

template<typename T, typename U>
bool chmax(T& xmax, const U& x) {
    if(xmax < x) {
        xmax = x;
        return true;
    }
    return false;
}

template<typename T, typename U>
bool chmin(T& xmin, const U& x) {
    if(x < xmin) {
        xmin = x;
        return true;
    }
    return false;
}

template<typename InputIt>
auto SUM(InputIt first, InputIt last) {
    using T = typename iterator_traits<InputIt>::value_type;
    return accumulate(first, last, T());
}

template<typename ForwardIt, typename UnaryOperation>
ForwardIt transform_self(ForwardIt first, ForwardIt last, UnaryOperation op) {
    return transform(first, last, first, op);
}

template<typename C>
void UNIQ(C& c) {
    c.erase(ALL(unique,c), end(c));
}

template<typename BinaryFunc, typename UnaryFunc>
auto ON(BinaryFunc bf, UnaryFunc uf) {
    return [bf,uf](const auto& x, const auto& y) {
        return bf(uf(x), uf(y));
    };
}

template<typename F>
auto LT_ON(F f) { return ON(less<>(), f); }

template<typename F>
auto GT_ON(F f) { return ON(greater<>(), f); }

template<typename T>
void FROM_STRING(const string& s, T& x) {
    istringstream in(s);
    in >> x;
}

template<typename T>
string TO_STRING(const T& x) {
    ostringstream out;
    out << x;
    return out.str();
}

template<typename InputIt>
string JOIN(InputIt first, InputIt last, const string& sep) {
    ostringstream out;
    while(first != last) {
        out << *first++;
        if(first != last)
            out << sep;
    }
    return out.str();
}

template<typename T>
void RD(T& x) {
    cin >> x;
#ifdef PROCON_LOCAL
    assert(cin);
#endif
}

template<typename T>
void RD(vector<T>& v, i64 n) {
    v.reserve(n);
    REP(_, n) {
        T e; RD(e);
        v.emplace_back(e);
    }
}

template<typename T>
ostream& operator<<(ostream& out, const vector<T>& v) {
    for(auto first = begin(v), it = first; it != end(v); ++it) {
        if(it != first)
            out << ' ';
        out << *it;
    }
    return out;
}

template<typename T1, typename T2>
ostream& operator<<(ostream& out, const pair<T1,T2>& p) {
    return out << '(' << p.first << ',' << p.second << ')';
}

void PRINT() {}

template<typename T, typename... TS>
void PRINT(const T& x, const TS& ...args) {
    cout << x;
    if(sizeof...(args)) {
        cout << ' ';
        PRINT(args...);
    }
}

template<typename... TS>
void PRINTLN(const TS& ...args) {
    PRINT(args...);
    cout << '\n';
}

template<typename T>
void DBG_IMPL(i64 line, const char* expr, const T& value) {
#ifdef PROCON_LOCAL
    cerr << "[L " << line << "]: ";
    cerr << expr << " = " << value << "\n";
#endif
}

#define DBG(expr) DBG_IMPL(__LINE__, #expr, (expr))
// }}}

// {{{ init
struct ProconInit {
    static constexpr int IOS_PREC = 15;
    static constexpr bool AUTOFLUSH = false;

    ProconInit() {
        cin.tie(nullptr);
        ios::sync_with_stdio(false);
        cout << fixed << setprecision(IOS_PREC);
#ifdef PROCON_LOCAL
        cerr << fixed << setprecision(IOS_PREC);
#endif
        if(AUTOFLUSH)
            cout << unitbuf;
    }
} PROCON_INIT;
// }}}

//--------------------------------------------------------------------

template<typename F>
class FixPoint {
public:
    explicit constexpr FixPoint(F&& f) : f_(forward<F>(f)) {}

    template<typename... Args>
    constexpr decltype(auto) operator()(Args&&... args) const {
        return f_(*this, forward<Args>(args)...);
    }

private:
    const F f_;
};

template<typename F>
decltype(auto) FIX(F&& f) {
    return FixPoint<F>(forward<F>(f));
}

constexpr i64 COST[10] = { INF, 2, 5, 5, 4, 5, 6, 3, 7, 6 };

i64 N;
i64 M;
vector<i64> A;

char from_digit(i64 d) {
    return static_cast<char>('0' + d);
}

string make_ans(i64 cheap, i64 q, const vector<i64>& ds) {
    string res(q, from_digit(cheap));

    vector<i64> ds2(ds);
    ALL(sort, ds2, greater<>());

    // cheap より大きい数字を処理
    {
        i64 i = 0;
        for(auto it = begin(ds2); it != end(ds2); ++it) {
            i64 d = *it;
            if(d < cheap) break;
            res[i++] = from_digit(d);
        }
    }

    // cheap より小さい数字を処理
    {
        i64 i = q-1;
        for(auto it = rbegin(ds2); it != rend(ds2); ++it) {
            i64 d = *it;
            if(d > cheap) break;
            res[i--] = from_digit(d);
        }
    }

    return res;
}

void solve() {
    // 最も安い中で最も大きい数字で埋める(桁数が最大になる)
    i64 cheap = *ALL(min_element, A, LT_ON([](i64 a) { return make_pair(COST[a],-a); }));
    i64 q,r; tie(q,r) = divmod(N, COST[cheap]);
    DBG(cheap);
    DBG(q);
    DBG(r);

    // 余ったマッチでは数字が作れないケースがある
    // (例: N=9, {1,8})
    // よって、ダメだったら桁数を減らして試す
    string ans;
    for(;;) {
        ans.clear();
        vector<i64> ds;
        auto dfs = FIX([cheap,q,&ans,&ds](auto self, i64 rr) {
            if(rr < 0) return;

            if(rr == 0) {
                DBG(ds);
                chmax(ans, make_ans(cheap,q,ds));
                DBG(ans);
                return;
            }

            for(auto a : A) {
                if(COST[a] == COST[cheap]) continue;  // cheap と同コストの数字を除外しないと無限ループ
                ds.emplace_back(a);
                self(rr+COST[cheap]-COST[a]);
                ds.pop_back();
            }
        });

        dfs(r);

        if(!ans.empty()) break;
        --q;
        r += COST[cheap];
    }

    PRINTLN(ans);
}

signed main() {
    RD(N);
    RD(M);
    RD(A, M);

    solve();

    return 0;
}


Measured memory_bytes: 256