#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(LL i = a;i<b; i++)
#define rrep(i,a,b) for(LL i = a;i>=b; i--)
#define INF ((1LL<<62)-(1LL<<31))
#define ooki 9,223,372,036,854,775,807
#define tii -9,223,372,036,854,775,808
typedef long long LL;
int main(){
 string n;cin>>n;
 if(n.size()==2){cout<<0<<n<<endl;}
 if(n.size()==1){cout<<"00"<<n<<endl;}
 if(n.size()==3){cout<<n<<endl;}
}