Go: package main

import "fmt"

func gcd(x, y int64) int64 {
	for y != 0 {
		r := x % y
		x = y
		y = r
	}
	return x
}

func lcm(x, y int64) int64 {
	return x / gcd(x, y) * y
}

func main() {
	for {
		var a, b int64

		fmt.Scanf("%d %d", &a, &b)

		if a == 0 && b == 0 {
			break
		}

		fmt.Printf("%d %d\n", gcd(a, b), lcm(a, b))
	}
}

C++: #include <iostream>

using namespace std;

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

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

C++: #include<cstdio>
#include<cstring>
#include<algorithm>
using namespace std;
int gcd(int a,int b)
{
	if(!b)
		return a;
	return gcd(b,a%b);
}
int main()
{
	int n,m;
	while(scanf("%d%d",&n,&m))
	{
		int tp=gcd(n,m);
		printf("%d %d\n",tp,n/tp*m);
	}
	return 0;
}

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

long gcd(long a, long b) {

    if ( a < b ) {
        long t = b;
        b = a;
        a = t;
    }

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

}

int main() {

    long a, b;
    
    while (cin >> a >> b) {

        long g = gcd(a, b);
        cout << g << " " << (a * b / g) << endl;
    }
     
    return 0;
}

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

int gcd(int a, int b){
  //a < b ユークリッドの互除法
  if(a==0) return b;
  return gcd(b%a,a);
}

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

C++: #include<iostream>
#include<cstdio>
using namespace std;
int a,b;
int gcd(int a,int b)
{
    if(b==0)
        return a;
    else
        return gcd(b,a%b);
}
int main()
{
    while(scanf("%d%d",&a,&b)!=EOF)
    {
        int x=gcd(a,b);
        int y=a/x*b;
        printf("%d %d\n",x,y);
    }
}

C++: #include<iostream>

using namespace std;

int main(){
	int a,b,ta,tb,tc;
	while(1){
		cin >> a>>b;
		if(!a && !b)break;
		ta=a;
		tb=b;
		while(1){
			if(ta<tb){
				tc=ta;
				ta=tb;
				tb=tc;
			}
			tc=ta%tb;
			if(tc==0)break;
			ta=tb;
			tb=tc;
		}
		cout << tb<< " "<< a*b/tb <<endl;
	}
	return 0;
}

C++: #include<iostream>
using namespace std;
int main(){
    int a,b,c,x;
    cin >> a >> b;
    c=a*b;
    if(a>=b){
        x=a;
        a=b;
        b=x%b;
    }
    else if(a<b){
        b=a%b;
    }
    while(b!=0){
        x=a;
        a=b;
        b=x%b;
    }
    cout << a << " " << c/a << endl;
}

C++: #include<stdio.h>
int main(void){
  int a,b,i=1,ans1,ans2,ans3,j;
  
  while(scanf("%d %d",&a,&b)!=EOF){
    ans2=i*a;
    ans3=i*b;
      i=1;
      if(a>b){
      while(ans2!=ans3){
	ans2=i*a;
	for(j=i;ans2>ans3;j++){
	  ans3=b*j;  
	}
	i++;
      }
      printf("%d %d\n",a*b/ans3,ans3); 
      }
  

    else if(b>a){
      i=1;
      while(ans3!=ans2){
	ans3=i*b;
	for(j=i;ans3>ans2;j++){
	  ans2=a*j;  
	}
	i++;
      }
      printf("%d %d\n",a*b/ans2,ans2);
    }

    else{
      printf("%d %d\n",a,a);   
    }
  }
  return 0;
}

C++: #include<iostream>
#include<stdio.h>
#include<algorithm>
#include<math.h>
using namespace std;
int main()
{
	int a,b,a1,b1,c;
	while(scanf("%d%d",&a,&b)!=EOF)
	{
		if(a<b)
		{
			a1=b;
			b1=a;
		}
		else
		{
			a1=a;
			b1=b;
		}
		while(1)
		{
			r=a1%b1;
			if(r==0)
				break;
			else
			{
				a1=b1;
				b1=r;
			}
		}
		cout<<r<<" "<<a*b/r<<endl;
	}	
	return 0;
}

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

using namespace std;

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

C++: #include <iostream>

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

int main()
{
    while (true) {
        int a, b;
        std::cin >> a >> b;
        if (std::cin.eof()) break;
        int g = gcd(a, b);
        std::cout << g << " " << a / g * b << std::endl;
    }
}

C++: #include<cstdio>
#include<cmath>
#include<cstring>
#include<cstdlib>
#include<iostream>
#include<algorithm>
using namespace std;
int gcd(int a,int b)
{
   if(b==0) return a;
   return gcd(b,a%b);
}
int main()
{
    int x,y;
    while(scanf("%d %d",&x,&y)!=EOF)
      printf("%d %d\n",gcd(x,y),x/gcd(x,y)*y);
    return 0;
}

C++: #include <iostream>
#include <vector>
using namespace std;
typedef long long bignum;
struct xy
{
	long long x;
	long long y;
};

int getGCD(int a, int b) {
	if (b != 0)
		return getGCD(b, a%b);
	else
		return a;
}
int main()
{
	int a, b;
	vector<xy> dst;
	while (cin >> a >> b ) {
		int GCD = a > b ? getGCD(a, b) : getGCD(b, a);
		bignum LCD = bignum(a) * bignum(b) / bignum(GCD);
		dst.push_back({ GCD ,LCD });
	}
	for (vector<xy>::iterator it = dst.begin(); it < dst.end(); it++)
		cout << (*it).x << " " << (*it).y << endl;
	return 0;
}

C++: #include<iostream>
using namespace std;
int euclid(int a,int b) {
  if(a<b) {
    int tmp=a;
    a=b;
    b=tmp;
  }
  if(a%b==0) return b;
  return euclid(b,a%b);
}

int main() {
  int a=0;
  int b=0;
  while(cin>>a>>b) {
    int n=euclid(a,b);
    cout<<n<<" "<<(a*b)/n<<endl;
  }
  return 0;
}

C++: #include <iostream>
#include <iomanip>
#include <cmath>

using namespace std;

double a, b, c, d, e, f;


double x(double, double, double, double, double, double) {

	return (c*e - b*f) / (a*e - b*d);
}

double y(double, double, double, double, double, double) {

	return (a*f - c*d) / (a*e - b*d);
}

double round(double dat, int keta ){

	int fct;
	fct = (int)pow(10, keta - 1);
	dat *= fct;
	dat += (dat < 0) ? -0.5 : 0.5;
	dat = (int)dat;
	dat /= fct;
	return dat;
}

int main()
{
	double x1, x2, y1, y2;
	cin >> a >> b >> c >> d >> e >> f;

	x1 = x(a, b, c, d, e, f);
	y1 = y(a, b, c, d, e, f);

	cin >> a >> b >> c >> d >> e >> f;

	x2 = x(a, b, c, d, e, f);
	y2 = y(a, b, c, d, e, f);

	cout << fixed << setprecision(3) << round(x1,4) << " " << round(y1,4) << endl;
	cout << fixed << setprecision(3) << round(x2,4) << " " << round(y2,4) << 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( b 1< 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 );
    }
    reutrn 0;
}

C++: #include<iostream>

int main(){
	int a, b, r;
	
	while(std::cin >> a >> b){
		int product = a*b;
		
		// GCD
		if(a < b){
			int temp = a;
			a = b;
			b = temp;
		}
		while((r = a%b) != 0){
			a = b;
			b = r;
		}
		
		// GCD show
		std::cout << b << std::endl;
		
		// LCM
		int lcm = product / b;

		//LCM show
		std::cout << lcm << std::endl;
	}
	
	return 0;
}

C++: #include <stdio.h>

int gcd( int m, int n)
{
if(n==0)
return m;
else
return gcd(n,m%n);
}

int lcm( int m, int n)
{
int gcd( int, int);
return( m * n / gcd (m , n));
}

int main()
{
int m, n , lcm( int, int), gcd( int ,int);
while(scanf("%d%d", &m,&n)==2){
printf("%d", gcd( m, n));
printf(" %d", lcm(m , n));}
return 0;
}