[Python/2015] Move solutions into .py files

Python/2015/04.py

@@ -0,0 +1,18 @@
+from lib import *
+
+input = read_input(2015, 4)
+
+
+def check(inp, cnt):
+    return hashlib.md5(inp.encode()).hexdigest().startswith("0" * cnt)
+
+
+def mine(cnt):
+    i = 1
+    while not check(f"{input.strip()}{i}", cnt):
+        i += 1
+    return i
+
+
+print(mine(5))
+print(mine(6))