Identify the time complexity of the following code as constant, linear, quadratic, cubic, log(n), nlog(n) or NP-hard. import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.InputMismatchException;
import java.io.IOException;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        FastReader in = new FastReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        E2RotateColumnsHardVersion solver = new E2RotateColumnsHardVersion();
        int testCount = Integer.parseInt(in.next());
        for (int i = 1; i <= testCount; i++)
            solver.solve(i, in, out);
        out.close();
    }

    static class E2RotateColumnsHardVersion {
        public void solve(int testNumber, FastReader in, PrintWriter out) {
            int n = in.nextInt();
            int m = in.nextInt();
            E2RotateColumnsHardVersion.Column[] columns = new E2RotateColumnsHardVersion.Column[m];
            for (int i = 0; i < columns.length; ++i) columns[i] = new E2RotateColumnsHardVersion.Column(new int[n]);
            for (int i = 0; i < n; ++i) {
                for (int j = 0; j < m; ++j) {
                    columns[j].v[i] = in.nextInt();
                    if (i == n - 1) columns[j].initMax();
                }
            }
            Arrays.sort(columns, (o1, o2) -> o2.max - o1.max);
            if (columns.length > n)
                columns = Arrays.copyOf(columns, n);

            long[] dp = new long[1 << n];
            for (E2RotateColumnsHardVersion.Column c : columns) {
                long[] ndp = new long[1 << n];
                System.arraycopy(dp, 0, ndp, 0, dp.length);

                for (int rot = 0; rot < n; ++rot) {
                    long[] temp = new long[1 << n];
                    System.arraycopy(dp, 0, temp, 0, dp.length);
                    for (int i = 0, pos = rot; i <... Complexity: