2017: d01: ex2: add solution

2017/d01/ex2/ex2.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python
+
+import sys
+
+
+def solve(input: str) -> int:
+    nums = [int(n) for n in input.strip()]
+    half = len(nums) // 2
+    return sum(n for n, m in zip(nums, nums[half:] + nums[:half]) if n == m)
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()