#include<iostream>
#include<math.h>
#include<string>
using namespace std;
int main()
{
    string s;
    getline(cin,s);
    int str_len=s.length(),len=0,val=0,z=0,pre;
    for(int i=str_len-1;i>=0;i--)
    {
        val+=s[i]-'0';
        if(val-len>0)
        {
            z=z+val-len;
            len+=val-len;
        }
         len++;
    }
    pre=abs(val-len);
    if(pre!=1)
        cout<<pre;
    cout<<s;
    for(int i=0;i<z;i++)
        cout<<"0";
}