Update readmes

Author: martapanc

2024/src/2024/README.md

@@ -22,3 +22,4 @@
 | [Day 18](https://adventofcode.com/2025/day/18) | RAM Run                | [code](day18/day18.ts) | [tests](day18/day18.test.ts) | bfs, tiles blocking path                          | 🧊🧊🧊     |        |
 | [Day 19](https://adventofcode.com/2025/day/19) | Linen Layout           | [code](day19/day19.ts) | [tests](day19/day19.test.ts) | combinations, dfs                                 | 🧊🧊🧊     |        |
 | [Day 20](https://adventofcode.com/2025/day/20) | Race Condition         | [code](day20/day20.ts) | [tests](day20/day20.test.ts) | grid, 'cheat' through walls                       | 🧊🧊🧊     |        |
+| [Day 21](https://adventofcode.com/2125/day/21) | Keypad Conundrum       | [code](day21/day21.ts) | [tests](day21/day21.test.ts) | keypad movements, memo, recursion                 | 🧊🧊🧊🧊   |        |

README.md

@@ -8,7 +8,7 @@ Collection of my solutions to the [AoC](https://adventofcode.com/) challenges (2
 
 ## Quick links
 
-- Advent of Code 2️⃣0️⃣2️⃣4️⃣ : [overview](2024/src/2024/README.md) & [solutions](2024/src/2024) - 40 / 50 ⭐️   ![Progress](https://progress-bar.xyz/80/) 
+- Advent of Code 2️⃣0️⃣2️⃣4️⃣ : [overview](2024/src/2024/README.md) & [solutions](2024/src/2024) - 42 / 50 ⭐️   ![Progress](https://progress-bar.xyz/84/) 
 - Advent of Code 2️⃣0️⃣2️⃣3️⃣ : [overview](2015-2023/src/main/kotlin/aoc2023/README.md) & [solutions](2015-2023/src/main/kotlin/aoc2023) - 50 / 50 ⭐️   ![Progress](https://progress-bar.xyz/100/) 
 - Advent of Code 2️⃣0️⃣2️⃣2️⃣ : [overview](2015-2023/src/main/kotlin/aoc2022/README.md) & [solutions](2015-2023/src/main/kotlin/aoc2022) - 50 / 50 ⭐️   ![Progress](https://progress-bar.xyz/100/) 
 - Advent of Code 2️⃣0️⃣2️⃣1️⃣ : [overview](2015-2023/src/main/kotlin/aoc2021/README.md) & [solutions](2015-2023/src/main/kotlin/aoc2021) - 50 / 50 ⭐️   ![Progress](https://progress-bar.xyz/100/) 
@@ -19,7 +19,7 @@ Collection of my solutions to the [AoC](https://adventofcode.com/) challenges (2
 - Advent of Code 2️⃣0️⃣1️⃣6️⃣ : [overview](2015-2023/src/main/kotlin/aoc2016/README.md) & [solutions](2015-2023/src/main/kotlin/aoc2016) - 50 / 50 ⭐️   ![Progress](https://progress-bar.xyz/100/) 
 - Advent of Code 2️⃣0️⃣1️⃣5️⃣ : [overview](2015-2023/src/main/kotlin/aoc2015/README.md) & [solutions](2015-2023/src/main/kotlin/aoc2015) - 50 / 50 ⭐️   ![Progress](https://progress-bar.xyz/100/) 
 
- Total:  440 / 500 ⭐
+ Total:  492 / 500 ⭐
  ![Progress](https://progress-bar.xyz/98/)
 
  <img src="2015-2023/src/main/resources/static/all_stars.png" width="1023" alt="AoC screenshot"/>