2023: d01: ex1: add solution

2023/d01/ex1/ex1.py

@@ -0,0 +1,20 @@
+#!/usr/bin/env python
+
+import sys
+
+
+def solve(input: list[str]) -> int:
+    def value(line: str) -> int:
+        digits = [int(c) for c in line if c.isdigit()]
+        return digits[0] * 10 + digits[-1]
+
+    return sum(value(line) for line in input)
+
+
+def main() -> None:
+    input = sys.stdin.read().splitlines()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()