#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>a.y;
    }
    return a.x<b.x;
}
bool verif(int i,int j){
    return c[i].y>c[j].y&&c[i].z>c[j].z;
}
void sclm(int& k){
    for(int i=1;i<=n;i++){
        if(verif(i,d[k]))
            d[++k]=i;
        else{
            int st=1,dr=k,poz=0;
            while(st<=dr){
                int mid=(st+dr)/2;
                if(verif(i,d[mid]))
                    st=mid+1;
                else{
                    poz=mid;
                    dr=mid-1;
                }
            }
            d[poz]=i;
        }
    }
}
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);
        int k=0;
        sclm(k);
        cout<<k<<'\n';
    }
    return 0;
}