Rust Taskbook Level 6.4
Ask the user to enter an integer via console. Get the factorial of the entered number.
Ask the user to enter a date in the format year-month-day. Check if they entered the value in the correct format.
Determine how many days are left until the New Year.
Get the current time as the following tuple:
("12", "59", "01")
Given a string:
"1 22 333 4444 22 5555 1"
Remove from this string all substrings in which the number of characters is more than three. In our case, we should get the following:
"1 22 333 22 1"
