Vupsen and Pupsen were gifted an integer array. Since Vupsen doesn't like the number 0, he threw away all numbers equal to 0 from the array. As a result, he got an array a of length n.

Pupsen, on the contrary, likes the number 0 and he got upset when he saw the array without zeroes. To cheer Pupsen up, Vupsen decided to come up with another array b of length n such that ∑_{i=1}^{n}a_i ⋅ b_i=0. Since Vupsen doesn't like number 0, the array b must not contain numbers equal to 0. Also, the numbers in that array must not be huge, so the sum of their absolute values cannot exceed 10^9. Please help Vupsen to find any such array b!

Input

The first line contains a single integer t (1 ≤ t ≤ 100) — the number of test cases. The next 2 ⋅ t lines contain the description of test cases. The description of each test case consists of two lines.

The first line of each test case contains a single integer n (2 ≤ n ≤ 10^5) — the length of the array.

The second line contains n integers a_1, a_2, …, a_n (-10^4 ≤ a_i ≤ 10^4, a_i ≠ 0) — the elements of the array a.

It is guaranteed that the sum of n over all test cases does not exceed 2 ⋅ 10^5.

Output

For each test case print n integers b_1, b_2, …, b_n — elements of the array b (|b_1|+|b_2|+… +|b_n| ≤ 10^9, b_i ≠ 0, ∑_{i=1}^{n}a_i ⋅ b_i=0).

It can be shown that the answer always exists.

Example

Input


3
2
5 5
5
5 -2 10 -9 4
7
1 2 3 4 5 6 7


Output


1 -1
-1 5 1 -1 -1
-10 2 2 -3 5 -1 -1

Note

In the first test case, 5 ⋅ 1 + 5 ⋅ (-1)=5-5=0. You could also print 3 -3, for example, since 5 ⋅ 3 + 5 ⋅ (-3)=15-15=0

In the second test case, 5 ⋅ (-1) + (-2) ⋅ 5 + 10 ⋅ 1 + (-9) ⋅ (-1) + 4 ⋅ (-1)=-5-10+10+9-4=0.
import java.util.*;
import java.io.*;

public class D {

    public void prayGod() throws IOException {
        int t = nextInt();
        while (t-- > 0) {
            int n = nextInt();

            long[] a = nextLongArray(n);
            long[] ret = new long[n];

            if (n % 2 == 0) {
                for (int i = 0; i < n; i += 2) {
                    long g = gcd(Math.abs(a[i]), Math.abs(a[i + 1]));
                    long lcm = Math.abs(a[i]) * Math.abs(a[i + 1]) / g;
                    ret[i] = lcm / a[i];
                    ret[i + 1] = lcm / a[i + 1];
                    if (a[i + 1] > 0)
                        ret[i + 1] = -ret[i + 1];
                    if (a[i] < 0)
                        ret[i] = -ret[i];
                }

            } else {
                for (int i = 0; i < n - 3; i += 2) {
                    long g = gcd(Math.abs(a[i]), Math.abs(a[i + 1]));
                    long lcm = Math.abs(a[i]) * Math.abs(a[i + 1]) / g;
                    ret[i] = lcm / Math.abs(a[i]);
                    ret[i + 1] = lcm / Math.abs(a[i + 1]);
                    if (a[i + 1] > 0)
                        ret[i + 1] = -ret[i + 1];
                    if (a[i] < 0)
                        ret[i] = -ret[i];
                }
                long g = gcd(Math.abs(a[n - 3]), Math.abs(a[n - 2]));
                long lcm = Math.abs(a[n - 3]) * Math.abs(a[n - 2]) / g;
                g = gcd(g, Math.abs(a[n - 1]));
                lcm = Math.abs(a[n - 1]) * lcm / g;
                lcm *= 2;
                ret[n - 3] = lcm / (Math.abs(a[n - 3]) * 2);
                ret[n - 2] = lcm / (Math.abs(a[n - 2]) * 2);
                ret[n - 1] = lcm / (Math.abs(a[n - 1]));
                if (a[n - 3] < 0)
                    ret[n - 3] = -ret[n - 3];
                if (a[n - 2] < 0)
                    ret[n - 2] = -ret[n - 2];
                if (a[n - 1] > 0)
                    ret[n - 1] = -ret[n - 1];
            }

            for (long v : ret) {
                out.printf("%d ", v);
            }
            out.println();

        }
    }

    public long gcd(long a, long b) {
        if (b == 0)
            return a;
        return gcd(b, a % b);
    }

    static final boolean RUN_TIMING = true;
    static final boolean AUTOFLUSH = false;
    static final boolean FILE_INPUT = false;
    static final boolean FILE_OUTPUT = false;

    static int iinf = 0x3f3f3f3f;
    static long inf = (long) 1e18 + 10;
    static long mod = 998244353L;

    static char[] inputBuffer = new char[1 << 20];
    static PushbackReader in = new PushbackReader(new BufferedReader(new InputStreamReader(System.in)), 1 << 20);
    static PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)), AUTOFLUSH);

    // int data-type
    public int nextInt() throws IOException {
        return Integer.parseInt(next());
    }

    public int[] nextIntArray(int n) throws IOException {
        int[] arr = new int[n];
        for (int i = 0; i < n; i++)
            arr[i] = nextInt();
        return arr;
    }

    public void sort(int[] a) {
        shuffle(a);
        Arrays.sort(a);
    }

    public static void printArray(int[] arr) {
        for (int i = 0; i < arr.length; i++)
            out.print(arr[i] + " ");
        out.println();
    }

    // long data-type
    public long nextLong() throws IOException {
        return Long.parseLong(next());
    }

    public long[] nextLongArray(int n) throws IOException {
        long[] arr = new long[n];
        for (int i = 0; i < n; i++)
            arr[i] = nextLong();
        return arr;
    }

    public static void printArray(long[] arr) {
        for (int i = 0; i < arr.length; i++)
            out.print(arr[i] + " ");
        out.println();
    }

    public void sort(long[] a) {
        shuffle(a);
        Arrays.sort(a);
    }

    // double data-type
    public double nextDouble() throws IOException {
        return Double.parseDouble(next());
    }

    public double[] nextDoubleArray(int n) throws IOException {
        double[] arr = new double[n];
        for (int i = 0; i < n; i++)
            arr[i] = nextDouble();
        return arr;
    }

    public static void printArray(double[] arr) {
        for (int i = 0; i < arr.length; i++)
            out.print(arr[i] + " ");
        out.println();
    }

    // Generic type
    public <T> void sort(T[] a) {
        shuffle(a);
        Arrays.sort(a);
    }

    public static <T> void printArray(T[] arr) {
        for (int i = 0; i < arr.length; i++)
            out.print(arr[i] + " ");
        out.println();
    }

    public String next() throws IOException {
        int len = 0;
        int c;
        do {
            c = in.read();
        } while (Character.isWhitespace(c) && c != -1);
        if (c == -1) {
            throw new NoSuchElementException("Reached EOF");
        }
        do {
            inputBuffer[len] = (char) c;
            len++;
            c = in.read();
        } while (!Character.isWhitespace(c) && c != -1);
        while (c != '\n' && Character.isWhitespace(c) && c != -1) {
            c = in.read();
        }
        if (c != -1 && c != '\n') {
            in.unread(c);
        }
        return new String(inputBuffer, 0, len);
    }

    public String nextLine() throws IOException {
        int len = 0;
        int c;
        while ((c = in.read()) != '\n' && c != -1) {
            if (c == '\r') {
                continue;
            }
            inputBuffer[len] = (char) c;
            len++;
        }
        return new String(inputBuffer, 0, len);
    }

    public boolean hasNext() throws IOException {
        String line = nextLine();
        if (line.isEmpty()) {
            return false;
        }
        in.unread('\n');
        in.unread(line.toCharArray());
        return true;
    }

    public void shuffle(int[] arr) {
        int n = arr.length;
        for (int i = 0; i < n; i++) {
            int j = (int) (Math.random() * (n - i));
            int temp = arr[i];
            arr[i] = arr[j];
            arr[j] = temp;
        }
    }

    public void shuffle(long[] arr) {
        int n = arr.length;
        for (int i = 0; i < n; i++) {
            int j = (int) (Math.random() * (n - i));
            long temp = arr[i];
            arr[i] = arr[j];
            arr[j] = temp;
        }
    }

    public void shuffle(Object[] arr) {
        int n = arr.length;
        for (int i = 0; i < n; i++) {
            int j = (int) (Math.random() * (n - i));
            Object temp = arr[i];
            arr[i] = arr[j];
            arr[j] = temp;
        }
    }

    public static void main(String[] args) throws IOException {
        if (FILE_INPUT)
            in = new PushbackReader(new BufferedReader(new FileReader(new File("output.txt"))), 1 << 20);
        if (FILE_OUTPUT)
            out = new PrintWriter(new FileWriter(new File("output.txt")));

        long time = 0;
        time -= System.nanoTime();
        new D().prayGod();
        time += System.nanoTime();

        if (RUN_TIMING)
            System.err.printf("%.3f ms%n", time / 1000000.0);

        out.flush();
        in.close();
    }
}
