#include <bits/stdc++.h>
using namespace std;
using lint = long long;
constexpr lint mod = 1e9 + 7;
#define all(x) (x).begin(), (x).end()
#define bitcount(n) __builtin_popcountl((lint)(n))
#define fcout cout << fixed << setprecision(15)
#define highest(x) (63 - __builtin_clzl(x))
#define rep(i, n) for(int i = 0; i < int(n); i++)
#define rep2(i, l, r) for(int i = int(l); i < int(r); i++)
#define repr(i, n) for(int i = int(n) - 1; i >= 0; i--)
#define repr2(i, l, r) for(int i = int(r) - 1; i >= int(l); i--)
#define SZ(x) int(x.size())
constexpr int inf9 = 1e9; constexpr lint inf18 = 1e18;
inline void YES(bool condition){ if(condition) cout << "YES" << endl; else cout << "NO" << endl; }
inline void Yes(bool condition){ if(condition) cout << "Yes" << endl; else cout << "No" << endl; }
inline void assertNO(bool condition){ if(!condition){ cout << "NO" << endl; exit(0); } }
inline void assertNo(bool condition){ if(!condition){ cout << "No" << endl; exit(0); } }
inline void assertm1(bool condition){ if(!condition){ cout << -1 << endl; exit(0); } }
lint power(lint base, lint exponent, lint module){ if(exponent % 2){ return power(base, exponent - 1, module) * base % module; }else if(exponent){ lint root_ans = power(base, exponent / 2, module); return root_ans * root_ans % module; }else{ return 1; }}
struct position{ int y, x; }; position mv[4] = {{0, -1}, {1, 0}, {0, 1}, {-1, 0}}; double euclidean(position first, position second){ return sqrt((second.x - first.x) * (second.x - first.x) + (second.y - first.y) * (second.y - first.y)); }
template<class T, class U> string to_string(pair<T, U> x){ return to_string(x.first) + "," + to_string(x.second); } string to_string(string x){ return x; }
template<class T> string to_string(complex<T> x){ return to_string(make_pair(x.real(), x.imag())); }
template<class itr> void array_output(itr start, itr goal){ string ans; for(auto i = start; i != goal; i++) cout << (i == start ? "" : " ") << (*i); if(!ans.empty()) ans.pop_back(); cout << ans << endl; }
template<class itr> void cins(itr first, itr last){ for(auto i = first; i != last; i++){ cin >> (*i); } }
template<class T> T gcd(T a, T b){ if(b) return gcd(b, a % b); else return a; }
template<class T> T lcm(T a, T b){ return a / gcd(a, b) * b; }
struct combination{ vector<lint> fact, inv; combination(int sz) : fact(sz + 1), inv(sz + 1){ fact[0] = 1; for(int i = 1; i <= sz; i++){ fact[i] = fact[i - 1] * i % mod; } inv[sz] = power(fact[sz], mod - 2, mod); for(int i = sz - 1; i >= 0; i--){ inv[i] = inv[i + 1] * (i + 1) % mod; } } lint P(int n, int r){ if(r < 0 || n < r) return 0; return (fact[n] * inv[n - r] % mod); } lint C(int p, int q){ if(q < 0 || p < q) return 0; return (fact[p] * inv[q] % mod * inv[p - q] % mod); } };
template<class itr> bool next_sequence(itr first, itr last, int max_bound){ itr now = last; while(now != first){ now--; (*now)++; if((*now) == max_bound){ (*now) = 0; }else{ return true; } } return false; }
template<class itr, class itr2> bool next_sequence2(itr first, itr last, itr2 first2, itr2 last2){ itr now = last; itr2 now2 = last2; while(now != first){ now--, now2--; (*now)++; if((*now) == (*now2)){ (*now) = 0; }else{ return true; } } return false; }
template<class T> bool chmax(T &a, const T &b){ if(a < b){ a = b; return 1; } return 0; }
template<class T> bool chmin(T &a, const T &b){ if(b < a){ a = b; return 1; } return 0; }
inline int at(lint i, int j){ return (i >> j) & 1; }
random_device rnd;
bool is_in_board(lint y, lint x, lint H, lint W){ return (0 <= y && y < H && 0 <= x && x < W); }

int main(){
    int N, K;
    cin >> N >> K;
    vector<lint> all;
    multiset<lint, greater<lint>> minus_zero, plus;
    rep(i, N){
        lint A;
        cin >> A;
        if(A <= 0){
            minus_zero.insert(-A);
        }else{
            plus.insert(A);
        }
        all.push_back(abs(A));
    }
    if((K % 2 == 1 && plus.empty()) || (K == N && minus_zero.size() % 2 == 1)){
        sort(all(all));
        lint ans = 1;
        rep(i, K){
            ans = ans * abs(all[i]) % mod;
        }
        cout << (mod - ans) % mod << endl;
        return 0;
    }
    lint mul = 1;
    int minus_cnt = 0;
    lint last_m = -1, last_p = -1;
    rep(i, K){
        lint m = (minus_zero.empty() ? -1 : *minus_zero.begin());
        lint p = (plus.empty() ? -1 : *plus.begin());
        if(m < p){
            mul = mul * p % mod;
            plus.erase(plus.begin());
            last_p = p;
        }else{
            mul = mul * m % mod;
            minus_zero.erase(minus_zero.begin());
            minus_cnt++;
            last_m = m;
        }
    }
    if(mul == 0){
        cout << 0 << endl;
        return 0;
    }
    if(minus_cnt % 2 == 1){
        lint a1 = 0, b1 = 1, a2 = 0, b2 = 1; // a1/b1とa2/b2を比較する
        if(plus.size() && last_m != -1){
            a1 = (*plus.begin());
            b1 = last_m;
        }
        if(minus_zero.size() && last_p != -1){
            a2 = (*minus_zero.begin());
            b2 = last_p;
        }
        if(a1 * b2 > a2 * b1){
            mul = mul * a1 % mod * power(b1, mod - 2, mod) % mod;
        }else{
            mul = mul * a2 % mod * power(b2, mod - 2, mod) % mod;
        }
    }
    cout << mul << endl;
}



Measured memory_bytes: 14172