//package cutii;

import java.io.*;
import java.util.*;

public class Main {
    static final String INPUT_FILE = "cutii.in";
    static final String OUTPUT_FILE = "cutii.out";

    public static class TokenizedReader {
        private final BufferedReader reader;
        private StringTokenizer tokenizer;

        TokenizedReader(String filePath) throws FileNotFoundException {
            reader = new BufferedReader(new FileReader(filePath));
        }

        private String nextToken() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        private int nextInt() {
            return Integer.parseInt(nextToken());
        }

        public void close() throws IOException {
            reader.close();
        }
    }

    public static void main(String[] args) throws IOException {
        TokenizedReader reader = new TokenizedReader(INPUT_FILE);
        PrintWriter writer = new PrintWriter(OUTPUT_FILE);
        solve(reader, writer);
        reader.close();
        writer.flush();
        writer.close();
    }

    public record Box(int x, int y, int z) {

    }

    public static void solve(TokenizedReader reader,
                             PrintWriter writer) {
        int n = reader.nextInt();
        int t = reader.nextInt();
        while (t-- > 0) {
            List<Box> boxes = new ArrayList<>();
            for (int i = 0; i < n; ++i) {
                int x = reader.nextInt();
                int y = reader.nextInt();
                int z = reader.nextInt();
                boxes.add(new Box(x, y, z));
            }

            boxes.sort((b0, b1) -> {
                int temp = Integer.compare(b0.x, b1.x);
                if (temp == 0) {
                    temp = Integer.compare(b0.y, b1.y);
                    if (temp == 0) {
                        temp = Integer.compare(b1.z, b0.z);
                        return temp;
                    }
                    return temp;
                }
                return temp;
            });

            List<Integer> nums = boxes.stream().map(it -> it.z).toList();
            TreeSet<Integer> lis = new TreeSet<>();
            lis.add(nums.get(0));
            for (int i = 1; i < nums.size(); ++i) {
                int num = nums.get(i);
                Integer ceiling = lis.ceiling(num);
                if (ceiling == null) {
                    lis.add(num);
                } else {
                    lis.remove(ceiling);
                    lis.add(num);
                }
            }
            writer.println(lis.size());
        }
    }
}