Problem Statement

Among the positive integers that consist of 0's and 2's when written in base 10, find the K-th smallest integer.

Input

Input is given from Standard Input in the following format:
K

Output

Print the answer as an integer.
Here, the exact value must be printed as an integer, even if it is big. Exponential notations such as 2.34e+22, for example, or unnecessary leading zeros such as 0523 are not allowed.

Constraints

• K is an integer between 1 and 10^{18} (inclusive).

Sample Input 1

3

Sample Output 1

22

The positive integers that consist of 0's and 2's when written in base 10 are $2,20,22,\dots$ in ascending order.
The (K=) 3-rd of them, which is 22, should be printed.

Sample Input 2

11

Sample Output 2

2022

Sample Input 3

923423423420220108

Sample Output 3

220022020000202020002022022000002020002222002200002022002200

Note that the exact value of the answer must be printed as an integer, even if it is big.

见题面 Input 部分

见题面 Output 部分