#include <bits/stdc++.h>

#define rep(i, n) for(int i = 0; i < n; i++)
using namespace std;

typedef long long ll;

const int INF = 1 << 30;
const ll LLINF = 1LL << 62;

int mod = 1000000007;

int main(void){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int N, K; cin >> N >> K;
    ll A[N]; rep(i, N) cin >> A[i];
    vector<pair<ll, int>> B(N); //absの大きい方から並べるようにする. A = {-5, 4, -2, 1} => B = {(5, 1), (4, 0), (2, 1), (1, 0)}
    rep(i, N){
        if(A[i] < 0) B[i] = pair<ll, int>(-A[i], 1);
        else B[i] = pair<ll, int>(A[i], 0);
    }
    sort(B.begin(), B.end(), greater<pair<ll, int>>());
    rep(i, N){
        if(B[i].second == 1) A[i] = -B[i].first;
        else A[i] = B[i].first;
    }
    if(K == N){
        ll ans = 1;
        rep(i, N){
            ans = ans * A[i] % mod;
        }
        if(ans < 0) ans += mod;
        cout << ans << endl;
    }
    else{
        ll ans = 1;
        int negcnt = 0;
        rep(i, K){
            if(A[i] < 0) negcnt++;
        }
        if(A[K-1] == 0){cout << 0 << endl; return 0;}
        else if(negcnt == K){
            if(K % 2){
                ll exc = -1;
                for(int i = K; i < N; i++) if(A[i] >= 0){exc = A[i]; break;}
                if(exc == -1){
                    for(int i = N-1; i > N-1-K; i--) ans = ans * A[i] % mod; //バグりそ～
                }
                else{
                    rep(i, K-1) ans = (ans * A[i]) % mod;
                    ans = (ans * exc) % mod;
                }
            }
            else{
                rep(i, K) ans = ans * A[i] % mod;
            }
        }
        else{
            if(negcnt % 2){
                //正数と負数はK個の中に確実に存在する (negcnt < K && negcnt % 2 == 1)
                ll temp1 = 1; //負整数をomit
                ll temp2 = 1; //正整数をomit
                ll ex_neg = 1, ex_pos = -1;
                for(int i = K; i < N; i++) if(A[i] < 0){ex_neg = A[i]; break;}
                for(int i = K; i < N; i++) if(A[i] > 0){ex_pos = A[i]; break;}
                if(ex_neg == 1 && ex_pos == -1) ans = 0;
                else{
                    ll rem_neg = 1, rem_pos = -1;
                    rep(i, K) if(A[i] < 0) rem_neg = A[i];
                    rep(i, K) if(A[i] > 0) rem_pos = A[i];
                    //en/rp倍にするか ep/rn倍にするか en/rp >= ep/rn <=> en*rn <= ep*rp
                    if(ex_pos != -1){
                        bool removed = false;
                        rep(i, K){
                            if(!removed && A[i] == rem_neg){
                                removed = true;
                            }
                            else temp1 = temp1 * A[i] % mod;
                        }
                        temp1 = temp1 * ex_pos % mod;
                    }
                    if(ex_neg != 1){
                        bool removed = false;
                        rep(i, K){
                            if(!removed && A[i] == rem_pos){
                                removed = true;
                            }
                            else temp2 = temp2 * A[i] % mod;
                        }
                        temp2 = temp2 * ex_neg % mod;
                    }
                    if(ex_pos == -1) ans = temp2; //負整数をomitできないとき
                    else if(ex_neg == 1) ans = temp1;
                    else{
                        if(ex_neg*rem_neg <= ex_pos*rem_pos) ans = temp1;
                        else ans = temp2;
                    } 
                }
            }
            else{
                rep(i, K) ans = ans * A[i] % mod;
            }
        }
        if(ans < 0) ans += mod;
        cout << ans << endl;
    }
    return 0;
}

Measured memory_bytes: 7836