Rust Taskbook Level 10.9

Задание 1

Given a file with text. Find the most frequently used symbol of this text and output it into a paragraph.

Задание 2

Write a code that will generate a password of a given size. The password must contain a lowercase and uppercase letter, a number, and some special symbol.

Задание 3

Given a string containing a fraction:

rust"12/16"

Write a code that will describe the process of reducing a fraction, like in school:

rust"12/16 = 6/8 = 3/4"

Задание 4

Given an arbitrary two-dimensional array:

rust[
  [11, 12, 13, 14, 15],
  [21, 22, 23, 24, 25],
  [31, 32, 33, 34, 35],
  [41, 42, 43, 44, 45],
  [51, 52, 53, 54, 55],
}

Swap the two given columns:

rust[
  [11, 15, 13, 14, 12],
  [21, 25, 23, 24, 22],
  [31, 35, 33, 34, 32],
  [41, 45, 43, 44, 42],
  [51, 55, 53, 54, 52],
}