ethan42 · Nov 8, 2026 · Nov 7, 2026
diff --git a/Makefile b/Makefile
@@ -73,7 +73,7 @@ $(BUILD)/llms.txt: $(CHAPTERS) glossary.md $(BUILD)/questions.md tools/llms.py t
 .PHONY: all fetch lint check-code exercises check clean
 fetch:
 	mkdir -p sources/slides/2026 sources/hw/2023 sources/hw/2024 sources/hw/2025
-	for f in lec00 lec01 lec02 lec03 lec04 lec05 lec06 lec07 lec08 lec09 lec10; do curl -fsSL -o sources/slides/2026/$$f.pdf https://progintro.github.io/assets/pdf/$$f.pdf; done
+	for f in lec00 lec01 lec02 lec03 lec04 lec05 lec06 lec07 lec08 lec09 lec10 lec11; do curl -fsSL -o sources/slides/2026/$$f.pdf https://progintro.github.io/assets/pdf/$$f.pdf; done
 	gh release download 2025 -R $(REPO) -D sources/slides -p 'lec*.pdf' -p make.pdf --skip-existing
 	gh release download 2025 -R $(REPO) -D sources/hw/2025 -p 'hw*.pdf' -p stergios.pdf --skip-existing
 	gh release download 2024 -R $(REPO) -D sources/hw/2024 -p 'hw*.pdf' --skip-existing

diff --git a/README.md b/README.md
@@ -325,7 +325,7 @@ chatbot ή agent το [`llms-full.txt`](llms-full.txt) (όλος ο οδηγός
 
 Ο οδηγός γράφτηκε από τις διαφάνειες των διαλέξεων του 2025-26
 ([progintro.github.io](https://progintro.github.io/)) και ενημερώνεται με τις διαφάνειες
-του 2026-27 καθώς δημοσιεύονται (ως τώρα: Διαλέξεις 0–10), τις
+του 2026-27 καθώς δημοσιεύονται (ως τώρα: Διαλέξεις 0–11), τις
 [σημειώσεις](https://progintro.github.io/notes/) του μαθήματος, τα
 [εργαστήρια](https://progintro.github.io/lab-material/) και τα θέματα εξετάσεων και τις
 εργασίες προηγούμενων ετών. Οι ασκήσεις έχουν υποδείξεις αλλά όχι λύσεις.

diff --git a/chapters/11-pointers-recursion/README.md b/chapters/11-pointers-recursion/README.md
@@ -3,9 +3,9 @@ layout: chapter
 chapter: 11
 lecture: 11
 title: "Δείκτες και Αναδρομή"
-date: 2025-11-07
+date: 2026-11-06
 part: C
-slides: https://github.com/progintro/progintro.github.io/releases/download/2025/lec11.pdf
+slides: https://progintro.github.io/assets/pdf/lec11.pdf
 prev: 10-arrays
 next: 12-pointers-arrays
 topics: [pointers, pointer-arithmetic, memory-model, arrays, recursion, integer-representation]
@@ -602,11 +602,12 @@ int main(int argc, char **argv) {
 
 ## Διάβασμα
 
-- **Διαφάνειες:** [Διάλεξη 11](https://github.com/progintro/progintro.github.io/releases/download/2025/lec11.pdf),
+- **Διαφάνειες:** [Διάλεξη 11](https://progintro.github.io/assets/pdf/lec11.pdf) (2026-27),
   σελ. 1–50. Μνήμη και διευθύνσεις σελ. 5–11· δείκτες, `sizeof` και `NULL`
   σελ. 12–19· αποαναφορά και μη έγκυροι δείκτες σελ. 20–24· πράξεις με δείκτες
   σελ. 25–28· δείκτες και πίνακες σελ. 29–35· παραδείγματα με πίνακες σελ. 36–42·
-  αναδρομή σελ. 43–48.
+  αναδρομή σελ. 43–48. Οι διαφάνειες του 2025-26 έχουν την ίδια αρίθμηση:
+  [Διάλεξη 11 (2025)](https://github.com/progintro/progintro.github.io/releases/download/2025/lec11.pdf).
 - **Σημειώσεις:** η διάλεξη μαζί με την επόμενη καλύπτει τις σελίδες 73–103 των
   σημειώσεων του κ. Σταματόπουλου:
   - [Κεφάλαιο 5: Δείκτες και πίνακες](https://progintro.github.io/notes/chapters/05-pointers-arrays/),

diff --git a/questions/slides/slides-lec11-access-by-address.md b/questions/slides/slides-lec11-access-by-address.md
@@ -4,8 +4,8 @@ kind: slides
 title: "Πρόσβαση σε μεταβλητή μόνο μέσω της διεύθυνσής της"
 source:
   title: "Διάλεξη 11, διαφάνεια 20"
-  url: https://github.com/progintro/progintro.github.io/releases/download/2025/lec11.pdf
-  years: [2025]
+  url: https://progintro.github.io/assets/pdf/lec11.pdf
+  years: [2025, 2026]
 chapters: [11]
 topics: [pointers]
 difficulty: 1

diff --git a/questions/slides/slides-lec11-array-pointer-trace.md b/questions/slides/slides-lec11-array-pointer-trace.md
@@ -4,8 +4,8 @@ kind: slides
 title: "Αναφορά σε στοιχεία πίνακα μέσω δείκτη"
 source:
   title: "Διάλεξη 11, διαφάνειες 29–30"
-  url: https://github.com/progintro/progintro.github.io/releases/download/2025/lec11.pdf
-  years: [2025]
+  url: https://progintro.github.io/assets/pdf/lec11.pdf
+  years: [2025, 2026]
 chapters: [11]
 topics: [pointer-arithmetic, pointers, arrays]
 difficulty: 1

diff --git a/questions/slides/slides-lec11-assign-through-pointers.md b/questions/slides/slides-lec11-assign-through-pointers.md
@@ -4,8 +4,8 @@ kind: slides
 title: "Αναθέσεις μέσω δεικτών"
 source:
   title: "Διάλεξη 11, διαφάνεια 24"
-  url: https://github.com/progintro/progintro.github.io/releases/download/2025/lec11.pdf
-  years: [2025]
+  url: https://progintro.github.io/assets/pdf/lec11.pdf
+  years: [2025, 2026]
 chapters: [11]
 topics: [pointers]
 difficulty: 1

diff --git a/questions/slides/slides-lec11-atoi-pitfalls.md b/questions/slides/slides-lec11-atoi-pitfalls.md
@@ -4,8 +4,8 @@ kind: slides
 title: "Τι μπορεί να πάει στραβά με την atoi"
 source:
   title: "Διάλεξη 11, διαφάνεια 42"
-  url: https://github.com/progintro/progintro.github.io/releases/download/2025/lec11.pdf
-  years: [2025]
+  url: https://progintro.github.io/assets/pdf/lec11.pdf
+  years: [2025, 2026]
 chapters: [11]
 topics: [strings, input-validation, integer-representation]
 difficulty: 2

diff --git a/questions/slides/slides-lec11-atoi.md b/questions/slides/slides-lec11-atoi.md
@@ -4,8 +4,8 @@ kind: slides
 title: "Η δική μας atoi"
 source:
   title: "Διάλεξη 11, διαφάνειες 41–42"
-  url: https://github.com/progintro/progintro.github.io/releases/download/2025/lec11.pdf
-  years: [2025]
+  url: https://progintro.github.io/assets/pdf/lec11.pdf
+  years: [2025, 2026]
 chapters: [11, 10]
 topics: [strings, arrays, functions]
 difficulty: 2

diff --git a/questions/slides/slides-lec11-average.md b/questions/slides/slides-lec11-average.md
@@ -4,8 +4,8 @@ kind: slides
 title: "Μέσος όρος πίνακα 100 ακεραίων"
 source:
   title: "Διάλεξη 11, διαφάνειες 37–38"
-  url: https://github.com/progintro/progintro.github.io/releases/download/2025/lec11.pdf
-  years: [2025]
+  url: https://progintro.github.io/assets/pdf/lec11.pdf
+  years: [2025, 2026]
 chapters: [11, 10]
 topics: [arrays, functions]
 difficulty: 1

diff --git a/questions/slides/slides-lec11-factorial-calls.md b/questions/slides/slides-lec11-factorial-calls.md
@@ -4,8 +4,8 @@ kind: slides
 title: "Πόσες αναδρομικές κλήσεις κάνει το factorial"
 source:
   title: "Διάλεξη 11, διαφάνεια 46"
-  url: https://github.com/progintro/progintro.github.io/releases/download/2025/lec11.pdf
-  years: [2025]
+  url: https://progintro.github.io/assets/pdf/lec11.pdf
+  years: [2025, 2026]
 chapters: [11]
 topics: [recursion]
 difficulty: 1

diff --git a/questions/slides/slides-lec11-factorial-negative.md b/questions/slides/slides-lec11-factorial-negative.md
@@ -4,8 +4,8 @@ kind: slides
 title: "Αρνητικό όρισμα στο αναδρομικό παραγοντικό"
 source:
   title: "Διάλεξη 11, διαφάνεια 46"
-  url: https://github.com/progintro/progintro.github.io/releases/download/2025/lec11.pdf
-  years: [2025]
+  url: https://progintro.github.io/assets/pdf/lec11.pdf
+  years: [2025, 2026]
 chapters: [11]
 topics: [recursion, undefined-behavior]
 difficulty: 2

diff --git a/questions/slides/slides-lec11-factorial-overflow.md b/questions/slides/slides-lec11-factorial-overflow.md
@@ -4,8 +4,8 @@ kind: slides
 title: "Αρνητικό παραγοντικό"
 source:
   title: "Διάλεξη 11, διαφάνεια 46"
-  url: https://github.com/progintro/progintro.github.io/releases/download/2025/lec11.pdf
-  years: [2025]
+  url: https://progintro.github.io/assets/pdf/lec11.pdf
+  years: [2025, 2026]
 chapters: [11]
 topics: [integer-representation, recursion]
 difficulty: 1

diff --git a/questions/slides/slides-lec11-factorial.md b/questions/slides/slides-lec11-factorial.md
@@ -4,8 +4,8 @@ kind: slides
 title: "Το παραγοντικό αναδρομικά σε C"
 source:
   title: "Διάλεξη 11, διαφάνειες 44–45"
-  url: https://github.com/progintro/progintro.github.io/releases/download/2025/lec11.pdf
-  years: [2025]
+  url: https://progintro.github.io/assets/pdf/lec11.pdf
+  years: [2025, 2026]
 chapters: [11]
 topics: [recursion, functions, command-line-args]
 difficulty: 1

diff --git a/questions/slides/slides-lec11-find.md b/questions/slides/slides-lec11-find.md
@@ -4,8 +4,8 @@ kind: slides
 title: "Θέση στοιχείου σε πίνακα ή -1"
 source:
   title: "Διάλεξη 11, διαφάνειες 39–40"
-  url: https://github.com/progintro/progintro.github.io/releases/download/2025/lec11.pdf
-  years: [2025]
+  url: https://progintro.github.io/assets/pdf/lec11.pdf
+  years: [2025, 2026]
 chapters: [11, 10]
 topics: [arrays, functions, searching]
 difficulty: 1

diff --git a/questions/slides/slides-lec11-pointer-sizes.md b/questions/slides/slides-lec11-pointer-sizes.md
@@ -4,8 +4,8 @@ kind: slides
 title: "Το μέγεθος δεικτών διαφορετικών τύπων"
 source:
   title: "Διάλεξη 11, διαφάνεια 18"
-  url: https://github.com/progintro/progintro.github.io/releases/download/2025/lec11.pdf
-  years: [2025]
+  url: https://progintro.github.io/assets/pdf/lec11.pdf
+  years: [2025, 2026]
 chapters: [11]
 topics: [pointers, types]
 difficulty: 1

diff --git a/questions/slides/slides-lec11-print-world.md b/questions/slides/slides-lec11-print-world.md
@@ -4,8 +4,8 @@ kind: slides
 title: "Πώς τυπώνω μόνο το World"
 source:
   title: "Διάλεξη 11, διαφάνειες 34–35"
-  url: https://github.com/progintro/progintro.github.io/releases/download/2025/lec11.pdf
-  years: [2025]
+  url: https://progintro.github.io/assets/pdf/lec11.pdf
+  years: [2025, 2026]
 chapters: [11]
 topics: [pointers, strings, arrays]
 difficulty: 1

diff --git a/sources/extract/lec11.yaml b/sources/extract/lec11.yaml
@@ -1,4 +1,6 @@
 lecture: 11
+year: 2026-27                     # updated from the 2025-26 deck (50 pages) on 2026-11-07; same page numbers
+slides: https://progintro.github.io/assets/pdf/lec11.pdf
 pages: 50
 outline:
   - {pages: "1", section: "(τίτλος)"}
@@ -34,6 +36,7 @@ pointers:
   - {page: 49, text: "Pointer tutorial [4]: https://www.programiz.com/c-programming/c-pointers"}
 takeaways_slide: null          # p. 47 (definition of recursion) and p. 49 (reading) are not takeaways slides
 issues:
+  - "2026-27 deck vs 2025-26 (both 50 pages, same page numbers, no content changes). pp. 3-4 add painting captions, and the memory diagram on p. 16 now puts the &c label on Byte 150 (in 2025-26 it pointed at Byte 148); the chapter already places c at 150. The «μεταβλητή x» slip on p. 16 is still there."
   - "Read tool could not render the PDF (no poppler for it); pages were rendered with pdftoppm -r 110 and read as PNGs. Link URLs recovered with pdftohtml -xml (xref warning, links intact)."
   - "p. 2: announcement 'Η Εργασία #1 έρχεται την επόμενη εβδομάδα!' (course policy, not put in the chapter)."
   - "p. 8-11, 15, 21, 27: memory diagrams draw the int 42 with its value in the last byte (103), i.e. big-endian order; the chapter notes this and points to chapter 12 (endianness)."

diff --git a/sources/manifest.yaml b/sources/manifest.yaml
@@ -32,7 +32,7 @@ lectures:
   - {n: 8,  slug: 08-control-flow-2,     date: 2026-10-26, part: B, slides: lec08.pdf, url: "https://progintro.github.io/assets/pdf/lec08.pdf", title: "Ροή Ελέγχου #2",                      notes: [03-control-flow],             labs: [lab03]}
   - {n: 9,  slug: 09-input,              date: 2026-10-30, part: B, slides: lec09.pdf, url: "https://progintro.github.io/assets/pdf/lec09.pdf", title: "Δεδομένα Εισόδου",                    notes: [01-first-programs, 09-io],    labs: [lab04]}
   - {n: 10, slug: 10-arrays,             date: 2026-11-02, part: C, slides: lec10.pdf, url: "https://progintro.github.io/assets/pdf/lec10.pdf", title: "Πίνακες",                             notes: [05-pointers-arrays],          labs: [lab06]}
-  - {n: 11, slug: 11-pointers-recursion, date: 2025-11-07, part: C, slides: lec11.pdf, title: "Δείκτες και Αναδρομή",                notes: [04-functions, 05-pointers-arrays], labs: [lab05, lab06]}
+  - {n: 11, slug: 11-pointers-recursion, date: 2026-11-06, part: C, slides: lec11.pdf, url: "https://progintro.github.io/assets/pdf/lec11.pdf", title: "Δείκτες και Αναδρομή",                notes: [04-functions, 05-pointers-arrays], labs: [lab05, lab06]}
   - {n: 12, slug: 12-pointers-arrays,    date: 2025-11-10, part: C, slides: lec12.pdf, title: "Δείκτες και Πίνακες",                 notes: [05-pointers-arrays],          labs: [lab06]}
   - {n: 13, slug: 13-memory,             date: 2025-11-14, part: C, slides: lec13.pdf, title: "Μνήμη",                               notes: [06-memory-strings],           labs: [lab07]}
   - {n: 14, slug: 14-scope-strings,      date: 2025-11-21, part: C, slides: lec14.pdf, title: "Εμβέλεια, Μνήμη και Συμβολοσειρές",   notes: [04-functions, 06-memory-strings], labs: [lab08]}