2015: d01: ex1: add solution

2015/d01/ex1/ex1.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python
+
+import collections
+import sys
+
+
+def solve(input: str) -> int:
+    directions = collections.Counter(input.strip())
+    return directions["("] - directions[")"]
+
+
+def main() -> None:
+    input = sys.stdin.read()
+    print(solve(input))
+
+
+if __name__ == "__main__":
+    main()