#include<bits/stdc++.h>
#define ll long long int
#define ld long double
#define FastIO ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0)
using namespace std;

int main(void)
{
    FastIO;

    string n;
    cin>>n;
    if(n.size()<3)
    {
        if(n.size()==1)
        {
            cout<<"00"<<n;
        }
        else
        {
            cout<<"0"<<n;
        }
    }
    else
    {
        cout<<n;
    }

    return 0;
}