Advent of Code 2025
arthomnix.dev
d07/part1: simplify counting code to only handle up to 4 digits as that's all we need
+4
-8
d07/part1.sed
+4
-8
d07/part1.sed
···
13
: a; s/aaaaaaaaaa/b/g; t b; b loop
14
: b; s/bbbbbbbbbb/c/g; t c; b loop
15
: c; s/cccccccccc/d/g; t d; b loop
16
-
: d; s/dddddddddd/e/g; t e; b loop
17
-
: e; s/eeeeeeeeee/f/g; t f; b loop
18
-
: f; s/ffffffffff/g/g; t g; b loop
19
-
: g; s/gggggggggg/h/g; t h; b loop
20
-
: h; s/hhhhhhhhhh//g
21
: loop
22
-
/a/! s/[b-h]*/&0/
23
s/aaaaaaaaa/9/
24
s/aaaaaaaa/8/
25
s/aaaaaaa/7/
···
31
s/a/1/
32
: next
33
y/bcdefgh/abcdefg/
34
-
/[a-h]/ b loop
35
# on the last line, print out the answer
36
$p
37
···
52
s/D/|/g # replace the intermediate "D" marker we used in the loop with '|'
53
s/.*\n// # get rid of the first line in the current pair
54
H # put the line in hold space
55
-
b outer # and loop
···
13
: a; s/aaaaaaaaaa/b/g; t b; b loop
14
: b; s/bbbbbbbbbb/c/g; t c; b loop
15
: c; s/cccccccccc/d/g; t d; b loop
16
+
: d; s/dddddddddd//g
17
: loop
18
+
/a/! s/[b-d]*/&0/
19
s/aaaaaaaaa/9/
20
s/aaaaaaaa/8/
21
s/aaaaaaa/7/
···
27
s/a/1/
28
: next
29
y/bcdefgh/abcdefg/
30
+
/[a-d]/ b loop
31
# on the last line, print out the answer
32
$p
33
···
48
s/D/|/g # replace the intermediate "D" marker we used in the loop with '|'
49
s/.*\n// # get rid of the first line in the current pair
50
H # put the line in hold space
51
+
b outer # and loop