拍卖



package xj;

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class PaMai {
static int T,goods,man;
static int data[][];
static int money[];
static int maxmoney;
static boolean []Rused;
static boolean []Sused;

 public static void main(String[] args) throws FileNotFoundException {
  /* Scanner sc=new Scanner(System.in); */
  Scanner sc=new Scanner(new File("src/PaiMai"));
  T=sc.nextInt();
  for (int t = 0; t < T; t++) {
   goods=sc.nextInt();
   man=sc.nextInt();
   data=new int [man+1][3];
   money=new int [man+1];
   Rused=new boolean[man+1];
   Sused=new boolean[goods+1];
   for (int i = 1; i < man+1; i++) {
     data[i][0]=sc.nextInt();data[i][1]=sc.nextInt();data[i][2]=sc.nextInt();
     money[i]=sc.nextInt();
   }
   dfs(1,0);
   /*for (int i = 1; i < man+1; i++) {
    for (int j = 1; j < goods+1; j++) {
     System.out.print(" "+data[i][j]);
    }
    System.out.println(" "+money[i]);
   }*/
   System.out.println(maxmoney);
  }
 }

 private static void dfs(int step, int sum) {
  if(step>man){
   if(maxmoney    return;
  }
  for (int i = 1; i <=man; i++) {
   if(!Rused[i]){
    //全买
    if(!Sused[data[i][0]]&&!Sused[data[i][1]]&&!Sused[data[i][2]]){
     sum+=money[i]*3;
     Sused[data[i][0]]=true;
     Sused[data[i][1]]=true;
     Sused[data[i][2]]=true;
     dfs(step+1,sum);
     sum-=money[i]*3;
     Sused[data[i][0]]=false;
     Sused[data[i][1]]=false;
     Sused[data[i][2]]=false;
    }
    //不买
     dfs(step+1,sum);
    //买两件
     if(!Sused[data[i][0]]&&!Sused[data[i][1]]){
      sum+=money[i]*2;
      Sused[data[i][0]]=true;
      Sused[data[i][1]]=true;
      dfs(step+1,sum);
      sum-=money[i]*2;
      Sused[data[i][0]]=false;
      Sused[data[i][1]]=false;
     }
     if(!Sused[data[i][1]]&&!Sused[data[i][2]]){
      sum+=money[i]*2;
      Sused[data[i][1]]=true;
      Sused[data[i][2]]=true;
      dfs(step+1,sum);
      sum-=money[i]*2;
      Sused[data[i][1]]=false;
      Sused[data[i][2]]=false;
     }
     if(!Sused[data[i][0]]&&!Sused[data[i][2]]){
      sum+=money[i]*2;
      Sused[data[i][0]]=true;
      Sused[data[i][2]]=true;
      dfs(step+1,sum);
      sum-=money[i]*2;
      Sused[data[i][0]]=false;
      Sused[data[i][2]]=false;
     }
   }
   
  }
 }

}

//

2
5 3
1 2 3 50
2 4 5 90
1 3 4 70
12 4
1 2 3 50
4 5 6 70
7 8 9 60
10 11 12 90

//

410
810