http://poj.org/problem?id=1230
//* @author: ccQ.SuperSupper
import java.io.*;
import java.util.*;
interface Pass{
int N = 100+10;
void SetInit(int n,int k);
void AddData(int left,int right);
void InitData();
int GetAns();
}
class Interval implements Comparable{
int left,right;
void set(int left,int right){
this.left = left;
this.right = right;
}
public int compareTo(Object obj){
Interval temp = (Interval)obj;
if(this.right>temp.right) return 1;
return -1;
}
}
class Muraille implements Pass{
int n,k,cnt;
int Graph[] = new int[N];
int select[] = new int[N];
Interval wall[] = new Interval[N];
Muraille(){
for(int i=0;i< N;++i) wall[i] = new Interval();
}
public void SetInit(int n,int k){
cnt = 0;
this.n = n;
this.k = k;
Arrays.fill(Graph, 0);
}
public void AddData(int left,int right){
wall[cnt].set(left, right);
for(int i=left;i<=right;++i){
++Graph[i];
}
++cnt;
}
public void InitData(){
Arrays.sort(wall,0,n);
}
void delete(int who){
for(int i=wall[who].left;i<=wall[who].right;++i){
--Graph[i];
}
wall[who].right = -1;
}
void delete(int left,int num){
for(int i=n-1;i>=0 && num>0;--i) if(wall[i].left<=left && wall[i].right!=-1){
--num;
delete(i);
}
}
public int GetAns(){
int ans=0;
for(int i=0;i< N;++i){
if(Graph[i]>k){
ans+=Graph[i]-k;
delete(i,Graph[i]-k);
}
}
return ans;
}
}
public class Main {
public static void main(String[]args)throws Exception{
int Test,n,k;
Muraille muraille = new Muraille();
StreamTokenizer cin = new StreamTokenizer(new BufferedReader(new InputStreamReader(System.in)));
Test = GetNum(cin);
while(Test--!=0){
n = GetNum(cin);
k = GetNum(cin);
muraille.SetInit(n,k);
for(int i=0;i< n;++i){
int left = GetNum(cin);
GetNum(cin);
int right = GetNum(cin);
GetNum(cin);
if(left>right) muraille.AddData(right, left);
else muraille.AddData(left, right);
}
muraille.InitData();
System.out.println(muraille.GetAns());
}
}
static int GetNum(StreamTokenizer cin)throws Exception{
cin.nextToken();
return (int) cin.nval;
}
}