restructure zeta/** to storage/zeta/**

storage/zeta/py/completed/27433.py

@@ -0,0 +1,10 @@
+def factorial(n):
+    if n <= 0:
+        return 1
+    else:
+        return n * factorial(n - 1)
+
+
+if __name__ == "__main__":
+    N: int = int(input())
+    print(factorial(N))