121 | a programming challenge

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Instructions

The goal is to fill the squares in the playground like the squares in the assignment.
There are multiple ways to solve the challenge.

Every assignment has a trivial solution of just listing all the coordinates. However, the goal is to find a shorter, algorithmic way of coloring the squares. See the manual and examples below for inspiration.

1

Playground

Assignment

Assignments

Stats

no stats yet

Manual

Fill a square

To fill a square at position (x, y) use the following instruction:

(x,y)

Example:

(0,0)

Variables

You can use variables to store values. To assign a value to a variable use the following instruction:

variable <- expression

Example:

x <- 3 x <- x + 1

Comments

To add a comment use the following instruction:

instruction # comment

Example:

x <- 3 # set x to 3 # this is ignored

Jump to a position

To jump to a position use the following instruction:

goto label

Example:

label:
# code
goto label

Conditions

You can use conditions to control the flow of the program. To use a condition use the following instruction:

expression | condition

Example:

goto start | x = 6

Examples

Example 1

(1,4)
(2,5)
(3,6)

Example 2

i <- 0
again:
(7,i)
i <- i + 1
goto again | i < 11

Example 3

i <- 0
loop:
(i,i)
i <- i + 1
goto loop | i < 11

Example 4

x <- 0
y <- 0
loop:
(x,y) | x % 2 = y % 2
x <- x + 1
y <- y + 1 | x > 10
x <- 0 | x > 10
goto loop | y < 11

Example 5

i <- 1
next:
j <- 0
k <- 0
goto fill

fill:
(i+k, i+j)
k <- k + 1
goto fill | k < 3
k <- 0
j <- j + 1
goto fill | j < 3
i <- i + 3
goto next | i < 10

Example 6

y <- 2
next:
(3,y)
(4,y) | y = 5
(5,y) | y = 5
(6,y) | y = 5
(7,y)
y <- y + 1
goto next | y < 9