Add comments and personal times to READMEs

3 files changed, 117 insertions, 0 deletions

diff --git a/2023/README.md b/2023/README.md
index 1a427bf..a74339e 100644
--- a/2023/README.md
+++ b/2023/README.md
@@ -20,3 +20,40 @@ My solutions read from stdin, so run the e.g. with
 ```
 $ ./a.out <in.txt
 ```
+
+## Personal times
+
+Note: New problems come out at 6am in my time zone. At some point in
+mid-December I started waking up early to try and solve the problem
+before work, but I could not always do it. On the weekend of December
+16-17 I was busy and I could not solve any problem at all. Regarding
+day 21, I just found it very hard and could not finish it within a day.
+
+```
+      --------Part 1--------   --------Part 2--------
+Day       Time   Rank  Score       Time   Rank  Score
+ 25   06:11:14   4908      0   06:11:45   3911      0
+ 24   03:00:50   3858      0   14:11:15   4807      0
+ 23   02:02:06   3632      0   05:26:44   3292      0
+ 22   00:45:32    876      0   01:02:38    853      0
+ 21   00:23:53   2444      0       >24h   9076      0
+ 20   01:47:17   3220      0   10:22:26   6402      0
+ 19   08:16:48  13555      0   09:44:24   8192      0
+ 18   14:34:39  17373      0       >24h  16383      0
+ 17       >24h  17185      0       >24h  16114      0
+ 16       >24h  26299      0       >24h  25438      0
+ 15   00:13:49   4618      0   00:55:28   4721      0
+ 14   00:16:47   2605      0   13:11:16  17486      0
+ 13   01:38:27   6390      0   01:45:34   4662      0
+ 12   00:45:36   3242      0   04:07:11   4066      0
+ 11   01:33:57   8963      0   01:34:56   7427      0
+ 10   02:58:19   9963      0   05:57:09   7684      0
+  9   02:38:53  13677      0   02:40:25  13016      0
+  8   00:27:21   7503      0   13:29:53  34979      0
+  7   01:56:33  11510      0   02:02:06   8448      0
+  6   01:53:38  16676      0   01:55:44  15724      0
+  5   03:24:25  18975      0   05:14:50  10799      0
+  4   03:04:29  26854      0   03:16:07  20315      0
+  3   03:38:55  17900      0   03:55:42  14753      0
+  2   03:44:00  24942      0   03:47:48  23122      0
+  1   03:14:59  28047      0   03:25:34  16991      0
diff --git a/2024/README.md b/2024/README.md
index 4f2580b..a451993 100644
--- a/2024/README.md
+++ b/2024/README.md
@@ -39,3 +39,40 @@ terminate the input.
 
 For second part you can edit the file `dayNNb.cpp` and run `make btest`
 and `make brun`.
+
+## Personal times
+
+Note: New problems come out at 6am in my time zone. This year I often
+(but not always) woke up a little earlier than 6am to start working on the
+problem as soon as possible. Times longer than 3-4 hours mean that I could
+not finish it before work, and I had to come back to it in the evening.
+
+```
+      --------Part 1--------   --------Part 2--------
+Day       Time   Rank  Score       Time   Rank  Score
+ 25   00:54:10   4422      0   00:54:16   3269      0
+ 24   11:44:35  15839      0   18:35:30   8732      0
+ 23   00:18:38   2083      0   01:53:35   4086      0
+ 22   01:04:02   4637      0   02:51:45   4681      0
+ 21   02:19:57   1984      0   02:53:08   1143      0
+ 20   00:41:17   2132      0   01:07:13   1603      0
+ 19   00:24:23   3105      0   00:31:20   2456      0
+ 18   00:30:40   3511      0   00:34:02   2739      0
+ 17   00:29:54   2025      0   02:36:06   2128      0
+ 16   00:56:46   3612      0   03:34:41   5061      0
+ 15   02:08:45   7410      0   03:05:07   4474      0
+ 14   00:23:18   2528      0   02:35:21   6607      0
+ 13   00:22:24   2299      0   00:39:37   1593      0
+ 12   00:27:28   3133      0   06:45:37  10514      0
+ 11   00:46:47   9102      0   01:03:57   5013      0
+ 10   00:12:16   1480      0   00:14:06   1130      0
+  9   00:14:06    962      0   00:34:43    888      0
+  8   01:30:36   9024      0   01:48:47   8635      0
+  7   01:43:27  10720      0   01:51:28   9649      0
+  6   00:51:16   9051      0   01:20:33   5290      0
+  5   01:20:49  12872      0   02:03:28  12064      0
+  4   01:55:28  15951      0   02:07:56  13646      0
+  3   01:37:48  19772      0   01:58:16  16711      0
+  2   00:32:58  10110      0   00:48:07   7148      0
+  1   03:23:24  19153      0   03:28:40  17929      0
+```
diff --git a/2025/README.md b/2025/README.md
index ece1c89..c72c8a5 100644
--- a/2025/README.md
+++ b/2025/README.md
@@ -6,3 +6,46 @@ from standard input if no argument is provided.
 Example
 
 `python 01/a.py 01/input.txt`
+
+## Personal times
+
+```
+Day   -Part 1-   -Part 2-
+  3   00:05:02   00:16:09
+  2   00:10:36   00:11:55
+  1   00:06:20   00:50:41
+```
+
+## Daily comments (spoilers!)
+
+### Day 1: Secret Entrance
+
+Part 1 was easy. Well, I misread the statement and got it wrong twice,
+but that's on me.
+
+Then I kept getting part 2 wrong, and I have no idea what I was doing wrong.
+Sure, at first I made some mistakes related to landing on zero at the
+end of a movement. But for at least 6-7 times I found a mistake, fixed,
+my code would solve the example case correctly but my answer on the real
+input was wrong. At some point I started rewriting the code in alternative
+ways hoping to get a different answer, and one of those versions worked.
+Still no idea why.
+
+So in the end it took me more than 40 minutes to solve part 2. Great start!
+
+### Day 1: Secret Entrance
+
+I misread the statement for part 1 and I accidentally solved part 2 first.
+I re-read the problem description, fixed my code, submitted it, and then
+I just had to press `Ctrl+Z` (actually `u` on vi...) enough times to solve
+part 2.
+
+### Day 3: Lobby
+
+My solution for part 1 is ad-hoc and not very good. I should have thought
+about it a bit longer, the general solution isn't much harder to find.
+
+For part 2 I used recursion with memorization (using Python's
+`functools.cache`), which is fast enough. But later Chiara pointed
+out to me that actually the solution is quite trivially greedy; I
+implemented the greedy version in `b-alt.py`.