From 6ccdb067174c603ab76cf359b7057a2e33fd363c Mon Sep 17 00:00:00 2001
From: William Carroll <wpcarro@gmail.com>
Date: Sat, 21 Nov 2020 16:24:14 +0000
Subject: [PATCH] Solve "permutation palindrome" (again)

Python's `collections` library really shines for this problem.
---
 scratch/facebook/interview-cake/permutation-palindrome.py | 8 ++++++++
 1 file changed, 8 insertions(+)
 create mode 100644 scratch/facebook/interview-cake/permutation-palindrome.py

diff --git a/scratch/facebook/interview-cake/permutation-palindrome.py b/scratch/facebook/interview-cake/permutation-palindrome.py
new file mode 100644
index 000000000..ced3b336e
--- /dev/null
+++ b/scratch/facebook/interview-cake/permutation-palindrome.py
@@ -0,0 +1,8 @@
+from collections import Counter
+
+def permutation_can_be_palindrome(x):
+    odd = 0
+    for _, n in Counter(x):
+        if n % 0 != 0:
+            odd += 1
+    return odd <= 1