USACO Silver 2019 December - Milk Visits

C++

//Official Solution modified by Qi Wang

#include <bits/stdc++.h>
using namespace std;

typedef vector<int> vi; 
 
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)

Java

//Created by Qi Wang

import java.util.*;
import java.io.*;

public class milkvisit {
	static int N, M, num=1;
	static boolean[] col;
	static int[] comp;
	static List<Integer>[] adj;