C :

#include<stdio.h>
void main(){
	int a,b,t;
	scanf("%d%d",&a,&b);
	if(a>b){
		t = a;
		a = b;
		b = t;
	} 
	printf("%d %d",a,b);
}

C++ :

#include <iostream>
using namespace std;
int main(){
	int a,b,t;
	cin>>a>>b;
	//如果a > b，交换ab
	if(a > b){
		t = a;
		a = b;
		b = t;
	}
	cout<<a<<" "<<b<<endl;
}

Python :

a,b = map(int,input().split() ) 
if a>b:
    print(b,a)
elif b>a:
    print(a,b)