#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c,n,x;
	cin>>n;
	a=n%10;
	b=n/10%10;
	c=n/100; 
	if(a==0){
		swap(a,b);
		if(a>c)swap(a,c);
		x=a*100+00+c;
	}else if(c==0){
		swap(c,b);
		if(a>c)swap(a,c);
		x=a*100+00+c;
	}else if(b==0){
		if(a>c)swap(a,c);
		x=a*100+00+c;
	}else{
		if(a>b)swap(a,b);
		if(b>c)swap(b,c);
		if(b>c)swap(b,c);
		x=a*100+b*10+c;
	}
	cout<<x;
	return 0;
}

/**************************************************************
	Problem: 1243
	User: tangkaixuan
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/