C :

#include<stdio.h>   

int main(){ 
	int a,b,c;
	scanf("%d %d %d",&a,&b,&c);
	
	if(a < b){
		int t = a;
		a = b;
		b = t;
	}
	
	if(b < c){
		int t = b;
		b = c;
		c = t;
	}
	
	if(a < b){
		int t = a;
		a = b;
		b = t;
	}
	
	printf("%d %d %d",a,b,c);

	return 0;
} 

C++ :

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

Python :

a,b,c = map(int,input().split());
# a>b>c
if a < b:
    t=a
    a=b
    b=t 
if a < c:
    t=a
    a=c
    c=t 
if b < c:
    t=b
    b=c
    c=t
print(a,b,c)