#include<bits/stdc++.h> using namespace std; int n,s=0; int main() { cin >>n; while (n!=0) { cout <<n%10; n=n/10; if (n%10==0) { s=s*10+n%10; n=n/10; } } return 0; }

#include<bits/stdc++.h>
using namespace std;
int n,s=0;
int main()
{
	cin >>n;
	while (n!=0)
	{
		cout <<n%10;
		n=n/10;
		if (n%10==0)
		{
			s=s*10+n%10;
			n=n/10;
		}
	}
	return 0;
}