int main()
{
int t,i,j,k,n,s,m;
scanf("%d",&t);
pii p;
while(t--){
v.clear();
scanf("%d",&n);
for(i=0;i<n;i++){
scanf("%d %d",&j,&k);
v.push_back(ii(j,0));
v.push_back(ii(k,1));
}
sort(v.begin(),v.begin()+2*n);
s=0,m=-SENTINEL;
for(i=0;i<2*n;i++){
p=v[i];
if(p.second==0)s+=1;
else s-=1;
m=max(m,s);
}
printf("%d\n",m);
}
return 0;
}
int generatePairsDfs(vpii &pairs) {
int index = findFirstNonAssignedIndex();
if (index >= 0) {
int result = 0;
for (int i = index+1; i < n; i++) {
if (!assigned[i] && colors[index] == colors[i]) {
assigned[i] = true;
assigned[index] = true;
pairs.push_back(make_pair(index, i));
result = max(result, generatePairsDfs(pairs));
assigned[i] = false;
assigned[index] = false;
pairs.pop_back();
}
}
return result;
} else {
return removeDishes(pairs);
}
}