Merge pull request #379 from 01-edu/printchessboard,robottoorigin,twosum

Printchessboard,robottoorigin,twosum

subjects/printchessboard.en.md

@@ -2,9 +2,9 @@
 
 ### Instructions
 
-Write a program that takes a two integer as argument and displays the chess desk, where white cells `' '` and black cells `'#'`.
+Write a program that takes two integers as arguments and displays the chess desk, in which white cells are represented by `' '` and black cells by `'#'`.
 
--   If the number of arguments is different from 2, or if the argument is not a positive number, the program displays `Error` followed by a newline (`'\n'`).
+- If the number of arguments is different from 2, or if the argument is not a positive number, the program displays `Error` followed by a newline (`'\n'`).
 
 ### Usage
 

subjects/robottoorigin.en.md

@@ -7,7 +7,8 @@ There is a robot at position (0, 0) at 2D map.
 Write a program, that outputs `true` if robot ends up at the origin (0, 0) after a sequence of moves, otherwise `false`. `\n` should be in the end of line.
 
 Sequence of moves is a string, which characters state for movement direction:
-- U - up 
+
+- U - up
 - D - down
 - R - right
 - L - left
@@ -17,13 +18,13 @@ If the number of arguments is not 1, output `\n`.
 ### Usage
 
 ```console
-$> go build
+student@ubuntu:~/[[ROOT]]/test$ go build
-$> ./main "UD"
+student@ubuntu:~/[[ROOT]]/test$ ./main "UD"
 true
-$> ./main "LL"
+student@ubuntu:~/[[ROOT]]/test$ ./main "LL"
 false
 ```
 
 In first case, the robot moves up and the down. So, it returned back to its origin position.
 
-In second example, the robot moves twice to the left. It is 2 positons left from its origin. So, program should output false.
+In second example, the robot moves twice to the left. It is 2 positions left from its origin, so the program outputs false.

subjects/twosum.en.md

@@ -11,18 +11,23 @@ This means that:
 - The function main declared needs to **also pass** the `Restrictions Checker`(illegal functions tester). It is advised for the student to just empty the function main after its own testings are done.
 - Every other rules are obviously the same than for a `program`.
 
-### Instructions:
+### Instructions
-Given an array of integers, return indices of the two numbers such that they add up to a specific target.
+
+Given an array of integers, return indexes of the two numbers such that they add up to a specific target.
+
 If there are more than one solution, return the first one.
+
 If there are no solutions, return nil.
 
-Expected function:
+Expected function :
+
 ```go
 func TwoSum(nums []int, target int) []int {
 }
 ```
 
 Here is a possible [program](TODO-LINK) to test your function :
+
 ```go
 package main