exercises(saddle-points): sync docs

exercises/practice/saddle-points/.docs/instructions.md

@@ -1,25 +1,26 @@
 # Instructions
 
-Detect saddle points in a matrix.
+Your task is to find the potential trees where you could build your tree house.
 
-So say you have a matrix like so:
+The data company provides the data as grids that show the heights of the trees.
+The rows of the grid represent the east-west direction, and the columns represent the north-south direction.
 
-```text
-    1  2  3
-  |---------
-1 | 9  8  7
-2 | 5  3  2     <--- saddle point at row 2, column 1, with value 5
-3 | 6  6  7
-```
-
-It has a saddle point at row 2, column 1.
+An acceptable tree will be the largest in its row, while being the smallest in its column.
 
-It's called a "saddle point" because it is greater than or equal to every element in its row and less than or equal to every element in its column.
+A grid might not have any good trees at all.
+Or it might have one, or even several.
 
-A matrix may have zero or more saddle points.
+Here is a grid that has exactly one candidate tree.
 
-Your code should be able to provide the (possibly empty) list of all the saddle points for any given matrix.
+```text
+    1  2  3  4
+  |-----------
+1 | 9  8  7  8
+2 | 5  3  2  4  <--- potential tree house at row 2, column 1, for tree with height 5
+3 | 6  6  7  1
+```
 
-The matrix can have a different number of rows and columns (Non square).
+- Row 2 has values 5, 3, 2, and 4. The largest value is 5.
+- Column 1 has values 9, 5, and 6. The smallest value is 5.
 
-Note that you may find other definitions of matrix saddle points online, but the tests for this exercise follow the above unambiguous definition.
+So the point at `[2, 1]` (row: 2, column: 1) is a great spot for a tree house.

exercises/practice/saddle-points/.docs/introduction.md

@@ -0,0 +1,11 @@
+# Introduction
+
+You plan to build a tree house in the woods near your house so that you can watch the sun rise and set.
+
+You've obtained data from a local survey company that show the height of every tree in each rectangular section of the map.
+You need to analyze each grid on the map to find good trees for your tree house.
+
+A good tree is both:
+
+- taller than every tree to the east and west, so that you have the best possible view of the sunrises and sunsets.
+- shorter than every tree to the north and south, to minimize the amount of tree climbing.