Added further wording polishes

Author: TianLangHin

competition/slime-chunk-farm/prob.md

@@ -37,13 +37,13 @@ The following is a simplified example of such input, with a size of 5x5 instead
 
 ## Output
 
-Your output should be an integer representing the smallest area (in meters squared)
-in which 50 slime chunks could be found.
+Your output should be an integer representing the smallest rectangular area (in meters squared)
+in which at least 50 slime chunks can be found.
 (Remember that one chunk is `16*16 = 256 m^2`.)
 
 If we consider a simplified version of this question where we are only looking for **4** slime chunks,
 using the example above, the smallest area turns out to be **2048 m^2**,
-being a 4x2 rectangle in the bottom-rightmost corner of the grid.
+being the 4x2 rectangle in the bottom-rightmost corner of the grid.
 
 In such a case the output to be given will be
 ```