#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
using ll=long long;
using Graph=vector<vector<int>>;
#define MAX 2000000
#define MOD 1000000007
#define INF 1000000000

int main(){
  string N;
  cin>>N;
  cout<<setfill('0')<<right<<setw(3)<<N<<endl;
}