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<stdio.h>
int main(){
  long long int a,b,n,i,j;
  while(scanf("%lld %lld",&a,&b)!=EOF){
    if(a>=b){
      n=b;
    }
    else{
      n=a;
    }
    i=a;
    j=b;

    while(1){
      /*   if(n<a){
	n=a%n;
      if(n==0){
	n=a;
	break;
      }
      }
      else if(n<b){
	n=b%n;
      if(n==0){
	n=b;
	break;
      }
      }*/

      n=a%b;
      if(n==0){
	n=b;
	break;
      }else{
	a=b;
	b=n;
      }

    }
    /*
    while(1){
      if(a*i==b*j){
	break;
      }
      else if(a*i<b*j){
	i++;
      }
     else if(a*i>b*j){
	j++;
	   }
	   }*/

    printf("%lld %.0f\n",n,(double)(i)*(double)(j)/(double)(n));
  }
  return (0);
}

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

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

int min(int a, int b){
    int d;
    
    if(a == 0 || b == 0){
        return 0;
    }
    
    d = a * b / max(a, b);
    
    return d;
}

int main()
{
    int a, b;
    
    while(cin >> a >> b){
        cout << max(a, b) << " " << min(a, b) << endl;
    } 
    
    return 0;
}

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

C++: #include <stdio.h>
#include <cmath>
using namespace std;

int lcm(int max, int min) {
    int multiplier = 1;
    while ((max * multiplier) % min != 0) {
        multiplier++;
    }
    return max * multiplier;
}

int gcd(int max, int min) {
    int r = max % min;
    int x = min;
    while (r != 0) {
        int tmp = r;
        r = x % r;
        x = tmp;
    }
    return x;
}

int main(void) {
    int a, b;
    while (scanf("%d %d", &a, &b)+1)  {
        int min = (a < b)? a : b;
        int max = (a < b)? b : a;
        printf("%d %d\n", lcm(max, min), gcd(max, min));
    }
    return 0;
}

C++: #include<iostream>

using namespace std;

long long calcGCD(long long a, long long b) {
	long long result = 0;

	while(result == 0) {
		if(a > b){
			a = a % b;
			if (a == 0) {
				result = b;
			}
		}
		else {
			b = b % a;
			if (b == 0) {
				result = a;
			}
		}
	} 
	return result;
}

int main() {
	long long a, b;

	while (cin >> a >> b) {

		long long gcd = calcGCD(a, b);
		long long lcm = a * b / gcd;

		cout << gcd << ' ' << lcm << endl;
	}
	return 0;
}

C++: #include <stdio.h>

#define REP(i, n) for(i=0;i<n;i++)
#define MOD_NUM (1000000007)

int main(void)
{
	int a, b;
	int gcd;
	long long int lcm;

	while ((scanf("%d %d", &a, &b)) != EOF){
		int i;

		gcd = 1;
		for (i = 2; i <= a && i <= b; i++){
			if (a % i == 0 && b % i == 0){
				gcd *= i;

				a /= i;
				b /= i;
				i--;
			}
		}
		lcm = gcd * a * b;

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

	return 0;
}

C++: #include <iostream>

using namespace std;

int calc_gcd(int a, int b) {
        int bigger = a > b ? a : b;
        int lower = a > b ? b : a;

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

        return b;
}

int calc_lcm(int a, int b) {
        int bigger = a > b ? a : b;
        int lower = a > b ? b : a;

        int ans = bigger;
        while((ans % lower) != 0) {
                ans = ans + bigger;
        }

        return ans;
}

int main(void) {
        int a,b;

        while(cin >> a >> b) {
                cout << calc_gcd(a,b);
                cout << " ";
                cout << calc_lcm(a,b);
                cout << endl;
        }

        return 0;
}

C++: #include <iostream>
using namespace std;
float LCM(float a,float b)
{
	if(a==b)
	return a;
	else
	{
		if(a>b)
		a-=b;
		else
		b-=a;
		LCM(a,b);
	}
}
int main()
{
	float a,b;
	long c;
	while(cin>>a>>b)
	{
		c=LCM(a,b);
		if(c>100000)
			cout<<c/10000<<"0000 "<<(a*b/c)/10000<<"0000"<<endl;
		else if((a*b/c)>100000)
			cout<<c<<" "<<(a*b/c)/10000<<"0000"<<endl;
		else
			cout<<c<<" "<<(a*b/c)<<endl;
	}
}

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

int gcd(int a,int b){
    int c;
    if(a<b){
        a+=b;
        b=a-b;
        a-=b;
    }
    while(b!=0){
        c=a%b;
        a=b;
        b=c;
    }
    return(a);
}

int main(){
    int data0,data1;
    int answer;
    while(cin>>data0>>data1){
        answer=gcd(data0,data1);
        cout<<answer<<" "<<data0*data1/answer<<endl;
    }
}

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

int main(int argc, char *argv[]){
    int a,b,r;
	while(cin>>a>>b){
		int a0=a,b0=b;
		r=a%b;
		while(r!=0){
			a=b;
			b=r;
			r=a%b;
		}
	    
		cout <<b<<" "<< a0*(b0/b) << endl;
	}
    return 0;
}

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

int main(){
	long a,b,m,n,tmp;
	
	while(cin>>a>>b){
		if(a>=b){
			m=a;
			n=b;
		}else{
			m=b;
			n=a;
		}
		
		for(;n!=0;){
			tmp=n;
			n=m%n;
			m=tmp;
		}
		
		cout<<m<<" "<<a*b/m<<endl;
	}
	return 0;
}

C++: #include <stdio.h>

int main(){

	int a=0, b=0,i=0,m=0,n=0,B=0,A=0;

	while(scanf("%d%d", &a, &b)!=EOF){
		B = b;
		A = a;
		if (a < b){
			i = a;
			a = b;
			b = i;
		}

		while (1){

			n = a%b;
			if (n == 0){
				printf("%d ", b);
				break;
			}
			m = n;
			n = b%m;
			b = m;
		}
		m = A*B;
		m /= b;

		printf("%d\n", m); 
	}

	return 0;
}

C++: #include <iostream>
using namespace std;
int main(void){
    int x, y, a, i, r;
    cin >> x >> y;
    while(x != 0 || y != 0){
        i = 0;
        
        if(y > x){
            a = x;
            x = y;
            y = a;
        }

        while(y != 0){
            r = x % y;
            x = r;
            r = y;
            y = x;
            x = r;
            i++;
        }
        
        cout << x << " " << i << endl;
        cin >> x >> y;
    }
    
}

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

int main() {
	long a,b,G;
	while (cin>>a>>b){
	long c = 1;
	for (c = 1;c <= b ;c= c+1){
		if(a%c == 0 , b%c == 0){
			G = c;
		}
	}cout<<G<<" "<<a*b/G<<endl;
	}
}

C++: #include <bits/stdc++.h>
using namespace std;
typedef long long int64;
int main(){
  int a,b;
  int temp;
  int i;
  int gcd,lcm;
  int64 A,B;
  while(scanf("%d %d",&a,&b) != EOF){
    A = a;
    B = b;
    while(b != 0){
      temp = a % b;
      a = b;
      b = temp;
    }
    gcd = a;
    lcm = (A * B) / gcd;
    cout << gcd << " " <<  lcm << endl;
  }
}

C++: #include <stdio.h>
#include <iostream>
#include <math.h>

int u(int a, int b);
int l(int a, int b);

int main(){
  int a, b;
  int gcd, lcm;
  
  while(scanf("%d", &a)!=EOF){
    scanf("%d", &b);
    gcd = u(a, b);
    lcm = l(a, b);
    std::cout << a << " " << b << std::endl;
  }
  
  return 0;
}

int u(int a, int b){
  while(a==1 || b==1){
    if(a>=b){
      a %= b;
    }else{
      b %= a;
    }
  }
  
  if(a==1) return b;
  else     return a;
}

int l(int a, int b){
  int i = 2;
  
  while(1){
    if(a%i==0){
      if(b%i==0) return i;
      else i++;
    }else{
      i++;
    }
  }
}