Add 2021, 2023

2021/day3.py

@@ -0,0 +1,12 @@
+#!/usr/bin/env python3
+
+def main():
+    with open("day3.sample", "r") as file:
+        lines = file.readlines()
+
+    for line in lines:
+        print(int(line.strip(), 2))
+
+
+if __name__ == "__main__":
+    main()

2021/day3.sample

@@ -0,0 +1,12 @@
+00100
+11110
+10110
+10111
+10101
+01111
+00111
+11100
+10000
+11001
+00010
+01010