Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"sort"
	"strconv"
)

// I/O
type Scanner struct {
	sc *bufio.Scanner
}

func NewScanner() *Scanner {
	sc := bufio.NewScanner(os.Stdin)
	sc.Split(bufio.ScanWords)
	sc.Buffer(make([]byte, 1024), int(1e+9))
	return &Scanner{sc}
}

func (s *Scanner) nextStr() string {
	s.sc.Scan()
	return s.sc.Text()
}

func (s *Scanner) nextInt() int {
	i, e := strconv.Atoi(s.nextStr())
	if e != nil {
		panic(e)
	}
	return i
}

func (s *Scanner) nextFloat() float64 {
	f, e := strconv.ParseFloat(s.nextStr(), 64)
	if e != nil {
		panic(e)
	}
	return f
}

func (s *Scanner) nextRuneSlice() []rune {
	return []rune(s.nextStr())
}

func (s *Scanner) nextIntSlice(n int) []int {
	res := make([]int, n)
	for i := 0; i < n; i++ {
		res[i] = s.nextInt()
	}
	return res
}

func (s *Scanner) nextFloatSlice(n int) []float64 {
	res := make([]float64, n)
	for i := 0; i < n; i++ {
		res[i] = s.nextFloat()
	}
	return res
}

// Arithmetic
func max(nums ...int) int {
	m := nums[0]
	for _, i := range nums {
		if m < i {
			m = i
		}
	}
	return m
}

func min(nums ...int) int {
	m := nums[0]
	for _, i := range nums {
		if m > i {
			m = i
		}
	}
	return m
}

func abs(x int) int {
	if x > 0 {
		return x
	}
	return -x
}

func pow(x, y int) int {
	res := 1
	for i := 0; i < y; i++ {
		res *= x
	}
	return res
}

// Sort
type Val struct {
	id, num int
}
type ByNum []Val

func (a ByNum) Len() int           { return len(a) }
func (a ByNum) Less(i, j int) bool { return a[i].num < a[j].num }
func (a ByNum) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }

func main() {
	sc := NewScanner()
	wtr := bufio.NewWriter(os.Stdout)
	N, M := sc.nextInt(), sc.nextInt()
	A := sc.nextIntSlice(N)
	B := sc.nextIntSlice(M)
	And := []int{}
	Or := []int{}
	setOr := make(map[int]bool)
	for _, a := range A {
		setOr[a] = true
	}
	for _, b := range B {
		if setOr[b] {
			And = append(And, b)
		}
		setOr[b] = true
	}
	for k, _ := range setOr {
		Or = append(Or, k)
	}
	sort.Ints(Or)
	sort.Ints(And)

	fmt.Fprintln(wtr, len(And), len(Or))
	for _, v := range And {
		fmt.Fprintln(wtr, v)
	}
	for _, v := range Or {
		fmt.Fprintln(wtr, v)
	}
	wtr.Flush()
}

C++: #include <iostream>
#include <set>
#include <vector>
#include <string>
#include <algorithm>
#include <iterator>
#include <map>
#include <utility>
#include <list>
#include <climits>
#include <bitset>
#include <numeric>

using namespace std;

#define rep(i, n) for(int i = 0; i < n; i++)
#define repi(i, n) for(auto i = (n).begin(); i != (n).end(); i++)
#define in_arr(type, a, n) copy_n(istream_iterator<type>(cin), n, (a).begin());
#define ll long long int

int main(){
    int n, m;
    cin >> n >> m;
    set<int> a, o, s, t;
    
    rep(i, n){
        int l;
        cin >> l;
        t.insert(l);
        o.insert(l);
    }
    
    rep(i, m){
        int l;
        cin >> l;
        s.insert(l);
        o.insert(l);
    }
    
    repi(i, s){
        if(t.find(*i) != t.end()){
            a.insert(*i);
        }
    }
    cout << a.size() << " " << o.size() << endl;
    repi(i, a){
        cout << *i << endl;
    }
    repi(i, o){
        cout << *i << endl;
    }
    
    return 0;
}

C++: #include<bits/stdc++.h>
#define INF 1e9
#define llINF 1e18
#define MOD 1000000007
#define pb push_back
#define mp make_pair 
#define F first
#define S second
#define ll long long
#define ull unsigned long long
#define vi vector<ll>
#define vvi vector<vi>
#define BITLE(n) (1LL<<(n))
#define BITCNT(n) (__builtin_popcountll(n))
#define SUBS(s,f,t) ((s).substr((f)-1,(t)-(f)+1))
#define ALL(a) (a).begin(),(a).end()
using namespace std;
struct Grid{ll x,y,t;};
struct Edge{ll to,cost;};
struct Graph{vector<vector<Edge>>E;int V;
  const ll Inf = llINF;const int MAX_V=201010;vector<ll>d;
  Graph(int n):E(n){d.resize(MAX_V);E.resize(n);V=n;}
  void init(){for(int i=0;i<MAX_V;i++)d[i]=Inf;}
  void add_edge(ll from,ll to,ll cost){E[from].pb({to,cost});}
};
int main(){
  cin.tie(0);
  ios::sync_with_stdio(false);
  ll n,m;cin>>n>>m;
  map<ll,ll>MP;
  ll an=0,o=0;
  set<ll> anv,ov;
  for(int i=0;i<n;i++){ll a;cin>>a;MP[a]++;}
  for(int j=0;j<m;j++){ll a;cin>>a;MP[a]++;}
  for(auto a:MP){
    if(a.S==1){o++;ov.insert(a.F);}
    else {o++;an++;ov.insert(a.F);anv.insert(a.F);}
  }
  cout<<an<<" "<<o<<endl;
  for(auto a:anv)cout<<a<<endl;
  for(auto a:ov)cout<<a<<endl;
  return 0;
}

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

int main() {
    int n, m;
    cin >> n >> m;
    set<int> OR;
    set<int> AND;
    set<int> a;
    set<int> b;
    for(int i = 1; i <= n; i++) {
        int in;
        cin >> in;
        a.insert(in);
        OR.insert(in);
    }
    for(int i = 1; i <= m; i++) {
        int in;
        cin >> in;
        OR.insert(in);
        if(a.find(in) != a.end()) AND.insert(in);
    }
    cout << AND.size() << " " << OR.size() << endl;
    for(auto itr = AND.begin(); itr != AND.end(); itr++) {
        cout << *itr << endl;
    }
    for(auto itr = OR.begin(); itr != OR.end(); itr++) {
        cout << *itr << endl;
    }
    return 0;
}

C++: #include <iostream>
#include <vector> 
using namespace std;

int main(void){
    int n,m;
    cin >> n >> m;
    int a[n];
    int b[m];
    vector<int> dup,all;
    
    for(int i=0;i<n;i++){
        cin >> a[i];     
    }
    for(int j=0;j<m;j++){
        cin >> b[j];
    }
    
    int ap=0;
    int bp=0;
    int i=0;
    while(ap!=n or bp!=m){
        i++;
        
        if(a[ap]==i and b[bp]==i) dup.push_back(i);
        if(a[ap]==i or b[bp]==i) all.push_back(i);

        while(a[ap]<=i and ap!=n) ap++;
        while(b[bp]<=i and bp!=m) bp++;
    }
    
    cout << dup.size() <<" "<< all.size()  << endl;
    
    for(auto itr = dup.begin(); itr != dup.end(); ++itr) {
        cout << *itr << endl;
    }
    for(auto itr = all.begin(); itr != all.end(); ++itr) {
        cout << *itr << endl;
    }

    return 0;
}

C++: //↓template↓

#include "bits/stdc++.h"
using namespace std;
#define Would
#define you
#define all(n)  n.begin(),n.end()
const long long INF = 1e18;
const long long MOD = 1e9 + 7;
const double pi = acos(-1);
const int SIZE = 1 << 17;
int dx[] = { 1,0 }, dy[] = { 0,1 }, alp[30];
long long fac[200005], finv[200005], inv[200005];
vector<long long>dij;
struct edge { long long to, cost; };
vector<vector<edge> >G;

long long mod_pow(long long a, long long b) {
	long long res = 1, mul = a;
	for (int i = 0; i < 31; ++i) {
		if (b >> i & 1) {
			res *= mul;
			res %= MOD;
		}
		mul = (mul * mul) % MOD;
	}

	return res;
}

void addedge(int from, int to, int cost) {
	G[from].push_back({ to,cost });
	G[to].push_back({ from,cost });
}

//↑template↑


long long a, b, k[200005], l[200005], mon;
queue<long long>ans;
set<long long>s;
int main() {
	cin >> a >> b;
	for (int i = 0; i < a; ++i) {
		cin >> k[i];
		s.insert(k[i]);
	}

	for (int i = 0; i < b; ++i) {
		cin >> l[i];
		s.insert(l[i]);
	}

	for (int i = 0; i < a; ++i) {
		while (mon < b&&l[mon] < k[i]) { ++mon; }
		if (mon == b) { break; }
		if (l[mon] == k[i]) {
			ans.push(k[i]);
			++mon;
		}
	}

	cout << ans.size() << " " << s.size() << endl;

	while (!ans.empty()) {
		cout << ans.front() << endl;
		ans.pop();
	}
	for (auto i : s) { cout << i << endl; }
}