#include<bits/stdc++.h> using namespace std; int main(){ int n; cin>>n; int a=n/100; int b=n/10%10; int c=n%10; int arr[3]={a,b,c}; sort(arr,arr+3,greater<int>()); int ans=arr[0]*100+arr[1]*10+arr[2]; cout<<ans; return 0; }