Rust Taskbook Level 5.8

Ask the user for two integers. Fill the vector with integers from the range specified by the user.

Given an array:

[
	[2, 1, 4, 3, 5],
	[3, 5, 2, 4, 1],
	[4, 3, 1, 5, 2],
}

Sort the elements in each subarray.

Given some array of numbers, for example, like this:

let arr = [1, 2, 3, 4, 5, 6];

Merge pairs of elements together:

[12, 34, 56]

Display the following pyramid on the screen:

111
222
333
444
555
666
777
888
999

Given a structure with a date:

struct Date
{
	year: u16,
	month: u8,
	day: u8,
}

Ask the user for a date in the format year-month-day. Write this date to a variable implementing our date structure.