#include"xx.h"
int main()
{
	string arr = "0";
	cin >> arr;
	for (int i = size(arr)-1; i >= 0; i--)
	{
		if (arr[i] != '0')
		{
			for (int j = i; j >= 0; j--)
			{
				cout << arr[j];
			}
			break;
		}
	}
}