#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int maxn = 1e5 + 5;
string s;
set<pair<int, int>> t;
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cin >> s;
  int cnt = 0;
  for (int i = (int)s.size() - 1; i >= 0; i--) {
    if (s[i] == '0')
      cnt++;
    else {
      if (cnt)
        cnt--;
      else
        s[i] = '0';
    }
  }
  cout << s;
}
