#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,a,b,c,h;
    cin>>n;
    a=n%10;
    b=n/10%10;
    c=n/100;
    if(a<b)swap(a,b);
    if(a<c)swap(a,c);
    if(b<c)swap(b,c);
    h=a*100+b*10+c*1;
    cout<<h;
    return 0;
}
/**************************************************************
	Problem: 1042
	User: chenmingyu
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/