「🎉」 init(2025): day 1

2024/day09/.envrc

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+use flake

2024/day09/flake.lock

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+{
+  "nodes": {
+    "nixpkgs": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1733412085,
+        "narHash": "sha256-FillH0qdWDt/nlO6ED7h4cmN+G9uXwGjwmCnHs0QVYM=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "4dc2fc4e62dbf62b84132fe526356fbac7b03541",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-24.11",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

2024/day09/flake.nix

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+{
+  description = "a test development environment for python";
+
+  inputs = {
+
+    nixpkgs = {
+      url = "nixpkgs/nixos-24.11";
+      flake = false;
+	};
+
+  };
+
+  outputs = inputs@{ nixpkgs, ... }:
+	{
+    devShell = {
+      x86_64-linux = let
+        pkgs = import nixpkgs { system = "x86_64-linux"; };
+      in pkgs.mkShell {
+        packages = with pkgs; [
+          gcc python3
+        ];
+        shellHook = ''
+          echo -e "\x1B[0;33mentering python test development environment...\x1B[0m"
+        '';
+      };
+    };
+  };
+}

2024/day09/part1.py

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+import os
+import os.path
+
+def checksum(hdd):
+    res = 0
+    for i in range(len(hdd)):
+        if hdd[i] != '.':
+            res += i * int(hdd[i])
+    return (res)
+
+def main():
+    file_path = "./input.txt"
+    if (os.path.isfile(file_path)):
+        content = open(file_path, "r").read()
+    else:
+        content = "2333133121414131402"
+
+    hdd = []
+
+    for i in range(len(content)):
+        if i % 2 == 0:
+            hdd.extend([i // 2 for x in range(int(content[i]))])
+        else:
+            hdd.extend(['.' for x in range(int(content[i]))])
+
+    print(hdd)
+
+    for i in range(len(hdd) - 1, -1, -1):
+        for j in range(len(hdd[:i])):
+            if (hdd[j] == '.'):
+                hdd[i], hdd[j] = hdd[j], hdd[i]
+                break
+    
+    print(checksum(hdd))
+
+
+
+if __name__ == '__main__':
+    main()

2024/day09/part2.py

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+import os
+import os.path
+
+def checksum(hdd):
+    res = 0
+    for i in range(len(hdd)):
+        if hdd[i] != '.':
+            res += i * int(hdd[i])
+    return (res)
+
+def has_free_size(hdd, j, size):
+    block_size = 0
+    while hdd[j] == '.':
+        block_size += 1
+        if block_size == size:
+            return True
+        j += 1
+    return False
+
+def main():
+    file_path = "./input.txt"
+    if os.path.isfile(file_path):
+        content = open(file_path, "r").read()
+    else:
+        content = "2333133121414131402"
+
+    hdd = []
+
+    for i in range(len(content)):
+        if i % 2 == 0:
+            hdd.extend([i // 2 for x in range(int(content[i]))])
+        else:
+            hdd.extend(['.' for x in range(int(content[i]))])
+
+    print(hdd)
+
+    block_len = 1
+    for i in range(len(hdd) - 1, -1, -1):
+        if '.' not in [hdd[i], hdd[i - 1]] and int(hdd[i - 1]) == int(hdd[i]):
+            block_len += 1
+            continue
+        
+        for j in range(len(hdd[:i])):
+            if has_free_size(hdd, j, block_len):
+                for k in range(block_len):
+                    hdd[i + k], hdd[j + k] = hdd[j + k], hdd[i + k]
+                block_len = 1
+                break
+        block_len = 1
+
+    print(checksum(hdd))
+
+
+
+if __name__ == '__main__':
+    main()