Go: package main

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

func gcd(num1, num2 int) int {
	if num2 == 0 {
		return num1
	}
	num3 := num1 % num2
	return gcd(num2, num3)
}

func lcm(num1, num2 int) int {
	if num1%num2 != 0 {
		num3 := gcd(num1, num2)
		for i := 1; ; i++ {
			check := num3 * i
			if check%num1 == 0 && check%num2 == 0 {
				return check
			}
		}
	} else {
		return num1
	}
}

func main() {
	scanner := bufio.NewScanner(os.Stdin)
	for scanner.Scan() {
		row := strings.Fields(scanner.Text())
		nums := []int{}

		for _, v := range row {
			num, _ := strconv.Atoi(v)
			nums = append(nums, num)
		}
		fmt.Println(gcd(nums[0], nums[1]), lcm(nums[0], nums[1]))
	}
}

C++: #include <iostream>
#include <vector>

u_int euclid_alg(const u_int a, const u_int b) {
	return a > b ? a % b : b % a;
}

int main(void) {
	u_int a,b;
	std::vector<u_int> num;
	while(std::cin >> a >> b){
		num.push_back(a);
		num.push_back(b);
	}

	for(int i = 0; i < (int)num.size(); i+=2){
		u_int pro = num[i] * num[i+1];
		while(num[i] != 0 && num[i+1] != 0){
		if(num[i] > num[i+1]){
				num[i] = euclid_alg(num[i],num[i+1]);
			}else{
				num[i+1] = euclid_alg(num[i],num[i+1]);
			}
		}

		if(num[i] == 0){
			num[i] = num[i+1];
			num[i+1] = 0;
		}
		num[i+1] = pro / num[i];
	}

	for(int j = 0; j < (int)num.size(); j+=2){
		std::cout << num[j] << " " << num[j+1] << std::endl; 
	}

	return 0;
}

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

unsigned int gcd(unsigned int a, unsigned int b)
{
  if (b == 0)
    return a;
  else
    gcd(b, a % b);
}

int main()
{
  unsigned int a, b;


  while (cin >> a >> b)
  {
    if (a < b)
    {
      int t = a;
      a = b;
      b = t;
    }

    int g = gcd(a,b);
    int l = a * (b / g);

    cout << g << ' ' << l << endl;
  }
  return 0;
}

C++: #include <iostream>
 
using namespace std;
 
int GCD(int a, int b)
{
    if(a % b == 0) { return b; }
 
    if(b % a == 0) { return a; }
 
    if(a > b) { return GCD(a % b, b); }
 
    if(a < b) { return GCD(a, b % a); }
}
 
 
int main()
{
    int a, b;
 
    while(cin >> a >> b)
    {
int n=GCD(a,b);
        cout << n << ' ' << a*b/n << endl;
    }
 
    return 0;
}

C++: #include <stdio.h>

int main(){
 
    int buf1[50],buf2[50];
 
    int k = 0;
    while( scanf( "%d %d",&buf1[k],&buf2[k] ) != EOF ) k++;
 
    for( int i = 0;i < k;i++ ){
        int b1 = buf1[i],b2 = buf2[i];
        int m,n;
        if( b1< b2 ){
            m = b2,n = b1;
        } else if( b1 > b2 ){
            m =  b1,n = b2;
        } else printf( "%d ",b2 );
 
        while( true ){
            int buf = n;
            n = m % n;
            m = buf;
            if( n == 0 ){
                printf( "%d\n",m );
                break;
        }
        while( b1 != b2 ){
            if( b1 < b2 ) b1 += buf1[i];
            else             b2 += buf2[i];
        }
        printf( "%d\n",b1 );
    }
    return 0;
}

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

int main(){
  int a, b;
  while(cin >> a >> b){

    int max = max(a, b);
    int min = min(a, b);

    long gcd = 0, lcm = 0;

    for(int i = 0; i < min; i++){
        if(max % i == 0) 
          gcd = i;
    }
    
    int j = 1;

    while(1){
      if((max * j) % min == 0){ 
        lcm = max * j;
        break;
      }
      else{ 
        i++;
      }
    }
    
    cout << gcd << " " << lcm << endl;
  }
}

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

int main() {
	long long a,b;
	while (cin >> a >> b) {
		long long gcd,lcm;
		// ??????????????????????????????
		long q = max (a,b);
		long r = min (a,b);
		for (;;) {
			if (r == 0) break;
			long new_r;
			new_r = q % r;
			q = r;
			r = new_r;
		}
		gcd = q;
		lcm = a * b / gcd;
		cout << gcd << " " << lcm << endl;
	}
	return 0;
}

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

int gcd(int a, int b)
{
	return b ? gcd(b, a % b) : a;
}

int main()
{
	int a, b, g, l;
	while (cin >> a >> b)
	{
	    g = gcd(a, b); l = a / g * b;
		cout << g << ' ' << l << endl;
	}
	return 0;
}

C++: #include <iostream>
#include <utility>

int main(){

	int a, b;

	while(std::cin >> a >> b){

		int minmul; //least common multiple
		int maxdivi = 1; //greatest common divisor
		int tmp_a = a;
		int tmp_b = b;

		if(a == 0 || b == 0){
			std::cout << 0 << " " << 0 << std::endl;

		}else{					//Euclidean Algorithm

			if(b > a)
				std::swap(a, b);

			while(a % b != 0){
				a = a % b;
				if(b > a)
					std::swap(a, b);
			}
		
		maxdivi = b;
		minmul = (tmp_a / maxdivi) * tmp_b; //a*b/maxdivi

		std::cout << maxdivi << " " << minmul << std::endl;
		}
	}

	return 0;
}

C++: #include<iostream>
typedef long long ll;
using namespace std;

ll gcd(ll a, ll b) {
    if (a % b == 0) return b;
    return gcd(b, a % b);
}



ll a, b;

int main() {
    
    while (cin >> a >> b) {
        ll g = gcd(a,b);
        cout << g << " " << a * b / g << "\n";
    }

}

C++: #include<iostream>
using namespace std;
int main(){
int a,b,i,ii,iii,maxkouyakusuu=0,lowkoubaisuu=20000000000000;
while(i>50){
cin>>a>>b;
for(ii=0;ii<a*b;++ii){
  if(a%ii==0 && b%ii==0 && ii>maxkouyakusuu){
    maxkouyakusuu=ii;
  }
for(iii=0;iii<a*b;++iii){
  if(iii%a==0 && iii%b==0 && iii<lowkoubaisuu){
    lowkoubaisuu=iii;
  }
}
}
  cout<<maxkouyakusuu<<" "<<lowkoubaisuu<<endl;
  ++i;
}
  return 0;
}

C++: #include<iostream>
#include<algorithm>
using namespace std;
int main() {
	long long a, b;
	while (cin >> a >> b){
		long long gcd;
		long long c = max(a, b);
		long long d = min(a, b);
		while (true){
			if (c % d == 0) {
				gcd = d;
				goto C;
			}
			else{
				c -= d;
				if (c <= d){
					swap(c, d);
				}
			}
		}
	C:
		cout << gcd << ' ' << a*b / gcd << endl;
	}
}

C++: #include <iostream>

using namespace std;

int getGcd(int a, int b)
{
  while (a && b) {
    if (a > b) a %= b;
    else if (b > a) b %= a;
    else if (a == b) return a;
  }

  if (a > b) return a;
  return b;
}

int main(void)
{
  int a, b;

  while (cin >> a >> b) {
    int gcd = getGcd(a, b);
    cout << gcd << ' ' << a * (b / gcd) << endl;
  }

  return 0;
}

C++: #include<cstdio>
int g(int x,int y){return y?g(y,x%y):x;}
int main(){
int x,y;
while(cin>>x>>y)printf("%d %d\n",g(x,y),x*y/g(x,y));
}

C++: #include "iostream"

using namespace std;

void keisann(int a, int b) {
	long long ac = a;
	long long bc = b;
	bool d = true;
	do {
		a = a%b;
		if (a == 0) {
			cout << b << " ";
			cout << (ac*bc) / b << endl;
			d = false;
			continue;
		}
		b = b%a;
		if (b == 0) {
			cout << a << " ";
			cout << (ac*bc) / a << endl;
			d = false;
			continue;
		}
	} while (d == true);
}

int main()
{
	int a, b;
	while (cin >> a, a != EOF) {
		cin >> b;
		if (a > b) { keisann(a, b); }
		else if (a < b) {
			int c = a;
			a = b;
			b = c;
			keisann(a, b);
		}
		else if (a == b) {
			cout << a << " " << a << endl;
		}
	}
	return 0;
}

C++: #include <iostream>
using namespace std;
using ll = long long;

inline ll gcd(const ll &a, const ll &b) { return b==0 ? a : gcd(b, a%b); }
inline ll lcm(const ll &a, const ll &b) { return a / gcd(a, b) * b; }

int main() {
	
	long long a, b;
	
	while(cin >> a >> b) {
		cout << gcd(a, b) << ' ' << lcm(a, b) << endl;
		if(cin.eof()) break;
	}
	
	return 0;
}

C++: #include <cstdlib>
#include <iostream>
#include <cstdio>
#include <cstring>

using namespace std;

long long gcd(int a,int b)
{
	if(a==0) return b;
	return (long long)gcd(b%a,a);
}

long long lcm(int a,int b)
{
	return (long long)a*b/gcd(a,b);
}

int main()
{
	int a,b;
	while(~scanf("%d%d",&a,&b))
	{
		cout<<gcd(a,b)<<' '<<lcm(a,b)<<endl;
	}

	return 0;
}