Competitions
Week 6: December 14 - 20. Char arrays 1
Delete digits
One positive integer n is given. Remove from this number all digits 3 and 9, leaving the order of other digits the same.
For example, the number 539013 will be transformed to 501.
Input
One positive integer n (1 ≤ n ≤ 1018
).
Output
Remove from the number n all digits 3 and 9, keeping the relative order of other digits.
Input example #1
539013
Output example #1
501