Go: package main

import "fmt"

func main() {
	var a, b int
	var gcd, lcm int

	for {
		_, err := fmt.Scanf("%d %d", &a, &b)
		if err != nil {
			return
		}

		var big, small int
		// GCD
		if a > b {
			big = a
			small = b
		} else {
			big = b
			small = a
		}

		for {
			if big%small == 0 {
				gcd = small
				break
			} else {
				small, big = big%small, small
			}
		}

		// LCM
		lcm = a * b / gcd

		fmt.Println(gcd, lcm)
	}
}

C++: #include<iostream>
#include<string>
#include<algorithm>
using namespace std;
main(){
	int n1,n2,a1,a2;
	while(cin>>n1>>n2){
		int mx=max(n1,n2);
		for(int i=mx;i>0;--i){
			if(n1%i==0 && n2%i==0){
				a1=i;
				break;
			}
		}
		int flag=1;
		for(int i=1;i<=10000,flag;++i){
			for(int j=1;j<=10000;++j){
			//cout<<n1*i<<" "<<n2*j<<endl;
				if(n1*i==n2*j){
					a2=n1*i;
					flag=0;
					break;
				}
			}
		}
		cout<<a1<<" "<<a2<<endl;
	}
}

C++: #include<iostream>
#include<stdio.h>
using namespace std;
int main(){
int a,b,x,y;
float L,xx,yy,xxx;
while(cin>>a>>b){
x=a;y=b;
while(1){
  if(x==y){break;}
  else if(x==0)break;
  else if(y==0)break;
  else if(x<y){y=y-x;x=x-y;}
  else{x=x-y;y=y-x;}
}
xxx=x;
xx=a;yy=b;
L=(xx*yy)/xxx;
cout<<y<<" ";printf("%.0f",L);cout<<endl;
}
  return 0;
}

C++: #include<stdio.h>
int main(void)
{
	long int a,b,aa,ba,i,x,y,bb;
	aa=1;
	ba=1;
	while(scanf("%ld %ld",&a,&b)!=EOF){
		x=a;
		y=b;
		aa=1;
		ba=1;
		
		if(b<a){
			while(1){
				if(aa==0){
					break;
				}
				aa=a%b;
				a=b;
				b=aa;
			}
			ba=x*y/a;
			printf("%ld %ld\n",a,ba);
		}
		else{
			while(1){
				if(aa==0){
					break;
				}
				aa=b%a;
				b=a;
				a=aa;
			}
			ba=x*y/b;
			printf("%ld %ld\n",b,ba);
		}
	}
}

C++: #include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<string> vs;
typedef vector<bool> vb;
typedef vector<char> vc;
typedef vector<ll> vll;
typedef vector<vector<int>> vvi;
typedef vector<vector<string>> vvs;
typedef vector<vector<char>> vvc;
typedef vector<vector<bool>> vvb;
typedef pair<int,int> P;
#define vrep(v,n) for(int i=0;i<n;i++){cin >> v.at(i);} //配列vにn個の要素を入力する
#define rep(i, l, n) for (int i = l; i < (int)(n); i++)
#define repn(i, l, n) for (int i = l; i <= (int)(n); i++)
#define pb push_back 

const int mod = 1000000007;
const int inf = 1e9;

int main(){
    while(1){
        int a = -1, b;
        cin >> a >> b;
        if(a == -1) break;
        cout << __gcd(a, b) << " " << (ll)a*b/__gcd(a,b)<< endl;
    }
}

C++: #include<iostream>
using namespace std;
int main(){
int a,b,x,y,L,i=0;
while(i=0;i<=50;++i){
  cin>>a>>b;
x=a;y=b;
while(1){
  if(x<y){y=y-x;}
  else if(x>y){x=x-y;}
  else if(x==y){break;}
}
L=(a*b)/x;
if(x==1){cout<<y<<" "<<y<<endl;}
else{cout<<y<<" "<<L<<endl;}
}
  return 0;
}

C++: #include <iostream>
using namespace std;
int main()
{int a, b, c = 0;while (cin >> a, cin >> b){for (int i = 1; i <= a, i <= b; i++){if (a % i == 0 && b % i == 0){c = i;}}cout << c << " " << a*b / c << endl;}return 0;}

C++: // B.cpp

#include <iostream>

using namespace std;

int gcd(int, int);
int lcm(int, int);

int main(void) {
	int a, b;
	cin >> a >> b; 
	cout << gcd(a, b) << " " <<  lcm(a, b) << endl;

	return 0;
}

int gcd(int a, int b) {
	int max, min, res;
	
	res = 1;
	
	if(a > b){
		max = a, min = b;
	}
	if(a <= b){
		max = b, min = a;
	}
	if(min == 0) return max;
	while(res) {
		res = max % min;
		max = min;
		min = res;
	}
	return max;
}
int lcm(int a, int b) {
	return a / gcd(a, b) * b;
}

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

int main(){

	long long a = 0, b = 0;

	while (cin >> a >> b){
		long long gcd = 0;
		long long lcm = 0;
		long long r = 0;
		long long temp_a = 0, temp_b = 0;
		temp_a = a;
		temp_b = b;
		while ((max(temp_a, temp_b) % min(temp_a, temp_b)) != 0){
			r = (max(temp_a, temp_b) % min(temp_a, temp_b));
			temp_a = temp_b;
			temp_b = r;
		}
		gcd = min(temp_a, temp_b);
		lcm = (a / gcd) * b;
		cout << gcd << " "<< lcm << endl;

	}

	//getchar();

	return 0;
}

C++: #include<stdio.h>
int main(){int a,b;while(scanf("%d%d",&a,&b))printf("%d %d\n",__gcd(a,b),__gcd(a,b)*b);return 0;}

C++: #include<iostream>
#include<stdio.h>
#include<string.h>
#include<math.h>
using namespace std;

#define MAX 256

int main(void){
	
	long max[50], min[50];
	for (long i = 0; i < 50; i++){
		max[i] = 0;
		min[i] = 0;
	}

	long a, b;
	long i = 0;

	while (scanf("%d%d", a, b) != EOF){
		while (max[i] == 0){
			for (long j = a; j > 0; j--){
				if (a%j == 0 && b%j == 0)max[i] = j;
			}
		}
		long j = 1;
		while (min[i] == 0){
			if ((a*j) % b == 0)min[i] = a*j;
			j++;
		}
		i++;
	}

	for (long j = 0; j < i; j++){
		printf("%d %d\n", max[j], min[j]);
	}

	return 0;
}

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

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

long lcm(long m, long n) {
    if(m == 0 || n == 0) return(0);
    return((m * n) / gcd(m, n));
}

int main(void) {
    long a, b;
    while(scanf("%ld %ld", &a, &b) != EOF) {
        cout << gcd(a, b) << " " << lcm(a, b) << endl;
    }
    return(0);
}

C++: #include <stdio.h>
int gcd(__int64 a,__int64 b){
	return b==0?a:gcd(b,a%b);
}
__int64 a,b;
int main()
{
	while(scanf("%ld%ld",&a,&b) != EOF){
		printf("%ld\n%ld\n",gcd(a,b),a * b / gcd(a,b));
	}
	return 0;
}

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

int gcd(int a, int b) {

    int x, r;        
    if(b > a){
        x = a;
        a = b;
        b = x;
    }

    while(b != 0){
        r = a % b;
        a = r;
        r = b;
        b = a;
        a = r;
    }
    return a; 
}

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

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

using namespace std;

int gcd( int m, int n )
{
	// 引数に０がある場合は０を返す
	if ( ( 0 == m ) || ( 0 == n ) )
		return 0;
	
	// ユークリッドの方法
	while( m != n )
	{
		if ( m > n ) m = m - n;
		else         n = n - m;
	}
	return m;
}//gcd

int lcm( int m, int n )
{
	// 引数に０がある場合は０を返す
	if ( ( 0 == m ) || ( 0 == n ) )
		return 0;
	
	return ((m / gcd(m, n)) * n); // lcm = m * n / gcd(m,n)
}//lcm

int main(){

  int a,b;
  
  
  while(cin >> a >> b){
    
    printf("%d %d\n",gcd(a,b),lcm(a,b));
    
  }
  
  return 0;
  
}

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

int main(){
  int a,b,tmp;
  while(cin >> a >> b){
    int tmp_a = a;
    int tmp_b = b;
    for(;;){
      if(b%a==0) break;
      tmp = a;
      a = b % a;
      b = tmp;
    }
    int GCD = a;
    int LCM = (tmp_b / a)*tmp_a;
    cout << GCD << " " << LCM<< endl;
  }
}

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

using namespace std;

int main() {
    int a,b,a2,b2;
    int lcm,gcd;
    while(cin >> a >> b){
        a2=a;
        b2=b;
        while(a != b){
        if(a>b){a = a-b;}
        else{b=b-a;}
        }
        lcm = a;
        gcd=a2 / lcm * b2;
        cout << lcm << " " << gcd << endl;
    }

}

C++: #include <iostream>
#include <algorithm>
#include <cstdio>
#include <string>
#include <sstream>
#include <cstdlib>
#include <cmath>
 
using namespace std;

int GCD(int max, int min){
    if(max % min == 0) { return min; }
    else return GCD(min, max % min);
}
 
int main(){
    long long int a, b;
    while(cin >> a >> b){
        long long int gcd = GCD(max(a, b), min(a, b));
        long long int lcm = a * b / gcd;
        cout << GCD(max(a, b), min(a, b)) << " " << lcm << endl;
    }
    return 0;
}

C++: def gcd(a,b)
      if b==0
            a
      else
            gcd(b,a%b)
end
def lcm(a,b){a * b / gcd(a,b)}
while line = gets
      a,b = line.split.map(&:to_i)
      print gcd(a,b)," ",lcm(a,b),"\n"
end