Eliminate stack shuffling by using bi in PE #25

diff --git a/extra/project-euler/025/025.factor b/extra/project-euler/025/025.factor
index 80a933dc63a74a106aca65fbd1dcdf2b7a4e4188..5dfe7b9f56343ea334886858a2fe2a6d42f1d826 100644 (file)
--- a/extra/project-euler/025/025.factor
+++ b/extra/project-euler/025/025.factor
@@ -39,7 +39,7 @@ IN: project-euler.025
 ! Memoized brute force
 
 MEMO: fib ( m -- n )
-    dup 1 > [ 1- dup fib swap 1- fib + ] when ;
+    dup 1 > [ [ 1 - fib ] [ 2 - fib ] bi + ] when ;
 
 <PRIVATE