#include <bits/stdc++.h>
using namespace std;
int n, m, bal;
string s, t;
int main() {
  ios_base::sync_with_stdio(false);
  cin >> s;
  n = s.length();
  bal = m = 0;
  for (int i = n - 1; i >= 0; --i) {
    if (s[i] == '0')
      --bal;
    else {
      if (bal + m >= 0) {
        int j = i;
        while (j >= 0 && s[j] == '1') {
          s[j] = '0';
          --j;
          ++m;
        }
        --bal;
      } else
        ++bal;
    }
  }
  cout << s;
  return 0;
}
