#include<bits/stdc++.h> using namespace std; int main() { int w,a,b,c,q,e,r; cin>>w; a=w/100; b=w%100/10; c=w%10; while(a<b||b<c||a<c) { if(a<b) swap(a,b); if(b<c) swap(b,c); if(a<c) swap(a,c); continue; } q=a100+b10+c; cout<<q; return 0; }