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#include<stdio.h>
#include<algorithm>
using namespace std;
typedef struct doboz{
int x;
int y;
int z;
}doboz;
doboz d[3505];
int n;
inline bool cmp(doboz a,doboz b)
{
if(a.x<b.x || a.x>b.x)
return a.x<b.x;
else
if(a.y<b.y || a.y>b.y)
return a.y<b.y;
else
return a.z<b.z;
}
void megold()
{
int x,y,z,max=1;
for(int i=n-1;i>=0 && i>max;i--)
{
int max1=1;
for(int j=i-1;j>=0 && max1+j>=max;j--)
{
max1=1;
x=d[i].x;
y=d[i].y;
z=d[i].z;
for(int k=j;k>=0 && max1+k>=max;k--)
if(d[k].x<x && d[k].y<y && d[k].z<z)
{
x=d[k].x;
y=d[k].y;
z=d[k].z;
max1++;
}
if(max1>max)
max=max1;
}
}
printf("%d\n",max);
}
int main()
{
int t,k,i,j;
freopen("cutii.in","r",stdin);
freopen("cutii.out","w",stdout);
scanf("%d %d",&n,&t);
for(k=0;k<t;k++)
{
for(i=0;i<n;i++)
scanf("%d %d %d",&d[i].x,&d[i].y,&d[i].z);
sort(d,d+n,cmp);
megold();
}
}