project-euler: Rewrap, update links, add copyrights, tests

[factor.git] / extra / project-euler / 038 / 038.factor

diff --git a/extra/project-euler/038/038.factor b/extra/project-euler/038/038.factor
index 11b7430189e23030df1d974598df47e91ab3044f..ceffdec347c544ede9a8c2b91f8d7ed9354d79f0 100644 (file)
--- a/extra/project-euler/038/038.factor
+++ b/extra/project-euler/038/038.factor
@@ -3,7 +3,7 @@
 USING: kernel math ranges project-euler.common sequences ;
 IN: project-euler.038
 
-! https://projecteuler.net/index.php?section=problems&id=38
+! https://projecteuler.net/problem=38
 
 ! DESCRIPTION
 ! -----------
@@ -14,23 +14,26 @@ IN: project-euler.038
 !     192 × 2 = 384
 !     192 × 3 = 576
 
-! By concatenating each product we get the 1 to 9 pandigital, 192384576. We
-! will call 192384576 the concatenated product of 192 and (1,2,3)
+! By concatenating each product we get the 1 to 9 pandigital,
+! 192384576. We will call 192384576 the concatenated product of
+! 192 and (1,2,3)
 
-! The same can be achieved by starting with 9 and multiplying by 1, 2, 3, 4,
-! and 5, giving the pandigital, 918273645, which is the concatenated product of
-! 9 and (1,2,3,4,5).
+! The same can be achieved by starting with 9 and multiplying by
+! 1, 2, 3, 4, and 5, giving the pandigital, 918273645, which is
+! the concatenated product of 9 and (1,2,3,4,5).
 
-! What is the largest 1 to 9 pandigital 9-digit number that can be formed as
-! the concatenated product of an integer with (1,2, ... , n) where n > 1?
+! What is the largest 1 to 9 pandigital 9-digit number that can
+! be formed as the concatenated product of an integer with
+! (1,2, ..., n) where n > 1?
 
 
 ! SOLUTION
 ! --------
 
-! Only need to search 4-digit numbers starting with 9 since a 2-digit number
-! starting with 9 would produce 8 or 11 digits, and a 3-digit number starting
-! with 9 would produce 7 or 11 digits.
+! Only need to search 4-digit numbers starting with 9 since a
+! 2-digit number starting with 9 would produce 8 or 11 digits,
+! and a 3-digit number starting with 9 would produce 7 or 11
+! digits.
 
 <PRIVATE