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 <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <ctime>
#include <cctype>
#include <climits>
#include <iostream>
#include <string>
#include <vector>
#include <map>
#include <list>
#include <queue>
#include <deque>
#include <algorithm>
#include <numeric>
#include <utility>
#include <complex>
#include <memory>
#include <functional>
using namespace std;
long long int gcd( long long int m, long long int n ){
	// ?????°?????????????????´??????????????????
	if ( ( 0 == m ) || ( 0 == n ) )
		return 0;
	
	// ???????????????????????????
	while( m != n )
	{
		if ( m > n ) m = m - n;
		else         n = n - m;
	}
	return m;
}//gcd
long long int lcm( long long int m, long long int n ){
	// ?????°?????????????????´??????????????????
	if ( ( 0 == m ) || ( 0 == n ) )
		return 0;
	
	return ((m / gcd(m, n)) * n); // lcm = m * n / gcd(m,n)
}//lcm
int main(){
	long long int a,b;
	while(cin>>a>>b){
	cout<<gcd(a,b)<<" "<<lcm(a,b)<<endl;
	}
	return 0;
}

C++: #include <iostream>
#include <stdio.h>
#include <string>
#include <math.h>
#include <algorithm>
using namespace std;
int main(){
 int a, b, c, temp, min, A, B;
 while(cin >> a >> b){
  if(a == 0){
    cout << "0" << " " << "0" << endl;
  }
  else if(b == 0){
    cout << "0" << " " << "0" << endl;
  }
  else if(a < b){
    temp = a;
    a = b;
    b = temp;
  }

    
  else if (a > b){
    A = a;
    B = b;

    while(1){
      c = A % B;
      if(c == 0) break;
      else if(c != 0){
        A = B;
        B = c;
      }
    }
    min = (a / B) * b;
    cout << B << " " << min << endl;
  }
  else if(a == b){
    cout << a << " " << a << endl;
  }

 }
 return 0; 
}

C++: #include <iostream>
#include <sstream>
#include <string>
#include <vector>
#include <stack>
#include <queue>
#include <deque>
#include <set>
#include <map>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <ctime>
using namespace std;

typedef long long ll;
typedef pair<int, int> P;

#define all(c) (c).begin(), (c).end()
#define pb push_back
#define mp make_pair
#define EXIST(v,i) (find(all(v), i) != (v).end())
#define ERASE(v,i) (v).erase(remove(all(v), i), (v).end())
#define INDEX(v,i) (find(all(v), i) - (v).begin())
#define rep(i,n) for(int i = 0; i < (int)n; ++i)
#define debug(x) cerr << #x << " = " << (x) << endl;

inline int toInt(string s) {int v; istringstream sin(s);sin>>v;return v;}
template<class T> inline string toString(T x) {ostringstream sout;sout<<x;return sout.str();}

const int INF = 100000000;
const double PI = 3.14159265358979323846;
const double EPS = 1e-10;

int main() {
	int a, b;
	while(~scanf(" %d %d", &a, &b)) {
		printf("%d %d\n", __gcd(a, b), a / __gcd(a, b) * b);
	}
	return 0;
}

C++: #include <iostream>
#include <vector>
#include <cassert>
#include <algorithm>
#include <functional>
#include <cmath>
#include <iomanip>
#include <limits>
#include <bits/stdc++.h>
using namespace std;
long long x,y;
int gcd(int x,int y){
    if(y==0){
        return x;
    }else{
        return gcd(y,x%y);
    }
    
}
int main(){
    while(cin >> x >> y){
        cout << gcd(x,y) << " "<< x*y/gcd(x,y) <<endl;

    }
        
}

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

int main(){
  long a, b;
  long ca, cb, tmp;
  long gcd, lcm;

  while(cin >> a){
    cin >> b;
    ca=a; cb=b;

    if(ca<cb){
      tmp=ca; ca=cb; cb=tmp;
    }

    while(cb==0){
      ca%=cb;
      if(ca==0){
        ca=cb;
        break;
      }
      cb%=ca;
    }
    gcd=ca;
    lcm=a*b/gcd;

    printf("%d %d\n", gcd, lcm);
  }

  return 0;
}

C++: #include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<ll, ll> P;

#define EACH(i,a) for (auto& i : a)
#define FOR(i,a,b) for (ll i=(a);i<(b);i++)
#define RFOR(i,a,b) for (ll i=(b)-1;i>=(a);i--)
#define REP(i,n) for (ll i=0;i<(n);i++)
#define RREP(i,n) for (ll i=(n)-1;i>=0;i--)
#define debug(x) cout<<#x<<": "<<x<<endl
#define pb push_back
#define ALL(a) (a).begin(),(a).end()

const ll linf = 1e18;
const int inf = 1e9;
const double eps = 1e-12;
const double pi = acos(-1);

template<typename T>
istream& operator>>(istream& is, vector<T>& vec) {
	EACH(x,vec) is >> x;
	return is;
}
template<typename T>
ostream& operator<<(ostream& os, vector<T>& vec) {
	REP(i,vec.size()) {
		if (i) os << " ";
		os << vec[i];
	}
	return os;
}
template<typename T>
ostream& operator<<(ostream& os, vector< vector<T> >& vec) {
	REP(i,vec.size()) {
		if (i) os << endl;
		os << vec[i];
	}
	return os;
}

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

int main() {
	std::ios::sync_with_stdio(false);
	std::cin.tie(0);
	ll a, b;
	while (cin >> a >> b) {
		cout << gcd(a, b) << " " << a * b / gcd(a, b) << endl;
	}
}

C++: #include<iostream>
#include<algorithm>
using namespace std;
int main(){
long long  a,b,ta,tb;
	
	while(cin>>a>>b){
	ta=a;tb=b;
	if(a<b)swap(a,b);
	while(1){
		long long  tmp=b;
		b=a%b;
		a=tmp;
		//cout<<a<<b<<endl;
		if(b==0)break;
	}
	cout<<a<<" "<<ta*tb/a<<endl;
	}
	return 0;
}

C++: #include <iostream>
using namespace std;
int main() {
	int a, b, c, an, bn;
	int max;
	while(cin >> a >> b) {
		if(a < b) {
			c = a;
			a = b;
			b = c;
		}
		for(int i = b; i > 0; i--) {
			if((a % i == 0)&&(b % i == 0)) {
				max = i;
				break;
			}
		}
		an = a;
		bn = b;
		while(1) {
			if(an < bn) {
				an += a;
			} else if(an > bn) {
				bn += b;
			} else {
				break;
			}
		}

		cout << max << " " <<an << endl;
	}

	return 0;
}

C++: #include<stdio.h>

using namespace std;

int max(int x, int y){
        int r;

        while((r = x % y) != 0){
                x = y;
                y = r;
        }
        return y;
}

long long int small(long long int x,long long  int y, int r){
        if(x * y % r  == 0)
                return x * y / r;
        else
                return x * y;
}       

int main(){
        int x,y,r;

        while((scanf("%ld %ld",&x,&y)) != EOF){
                if(x < y){
                        int num = y;
                        y = x;
                        x = num;
                } 
                cout << max(x,y) << " " << small(x,y,max(x,y)) << endl;
        }
}

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

long long int GCD(long long int a, long long int b) {
    return (b % a == 0) ? a : GCD(b % a, a);
}

long long int LCM(long long int a, long long int b) {
    return (a / GCD(a, b)) * b;
}

int main() {
    long long int a, b;
    while (cin >> a >> b) {
        cout << GCD(a, b) << " " << LCM(a, b) << endl;
    }    
    return 0;
}

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 g;
    int n,m;
    int l;
    while(cin>>n>>m){
        if(n>=m)
            g=gcd(n,m);
        else
            g=gcd(m,n);
        l=g*(n/g)*(m/g);
        cout<<g<<" "<<l<<endl;
    }
    return 0;
}

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

int gcd(int a, int b){
    
    if ((0 == a)||(0 == b))
        return 0;
        
    while(a!=b){
        if(a>b)  a=a-b;
        else     b=b-a;
        }
        return a;
}


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