#include <fstream>
#include <algorithm>
using namespace std;
ifstream cin("cutii.in");
ofstream cout("cutii.out");
int n,t,i,d[3502];
struct cub{
int x,y,z;
}c[3502];
bool cmp(cub a,cub b){
    if(a.x==b.x){
        if(a.y==b.y)
            return a.z>b.z;
        return a.y>b.y;
    }
    return a.x<b.x;
}
bool verif(int i,int j){ //bag cutia j in cuita i
    return c[i].y>c[j].y&&c[i].z>c[j].z;
}
int sclm(){
    for(int i=1;i<=n;i++)
        d[i]=1;
    int k=0;
    for(int i=2;i<=n;i++){
        for(int j=1;j<i;j++){
            if(verif(i,j)&&d[j]+1>d[i]){
                d[i]=d[j]+1;
            }
        }
        k=max(k,d[i]);
    }
    return k;
}
int main()
{
    cin>>n>>t;
    while(t--){
        for(i=1;i<=n;i++)
            cin>>c[i].x>>c[i].y>>c[i].z;
        sort(c+1,c+n+1,cmp);
        cout<<sclm()<<'\n';
    }
    return 0;
}