From dabf4465ced41400d83e484b11d338ec02654c42 Mon Sep 17 00:00:00 2001
From: Conor Hoekstra <codereport@outlook.com>
Date: Wed, 15 Mar 2023 14:24:46 -0400
Subject: Python & BQN to 208 P2

---
 challenge-208/conor-hoekstra/ch-02.bqn | 4 ++++
 challenge-208/conor-hoekstra/ch-02.py  | 9 +++++++++
 2 files changed, 13 insertions(+)
 create mode 100644 challenge-208/conor-hoekstra/ch-02.bqn
 create mode 100644 challenge-208/conor-hoekstra/ch-02.py

diff --git a/challenge-208/conor-hoekstra/ch-02.bqn b/challenge-208/conor-hoekstra/ch-02.bqn
new file mode 100644
index 0000000000..4913670e2e
--- /dev/null
+++ b/challenge-208/conor-hoekstra/ch-02.bqn
@@ -0,0 +1,4 @@
+FindDuplicate ← {¯1⌈´1+/2=+˝𝕩=⌜1+↕≠𝕩}
+
+# Tests
+FindDuplicate ¨ ⟨1,2,2,4⟩‿⟨1,2,3,4⟩‿⟨1,2,3,3⟩ # ⟨ 1 ¯1 2 ⟩
diff --git a/challenge-208/conor-hoekstra/ch-02.py b/challenge-208/conor-hoekstra/ch-02.py
new file mode 100644
index 0000000000..fdc6510062
--- /dev/null
+++ b/challenge-208/conor-hoekstra/ch-02.py
@@ -0,0 +1,9 @@
+
+from collections import Counter, defaultdict
+
+def find_duplicate(nums):
+    return defaultdict(lambda:-1, map(reversed, Counter(nums).items()))[2]
+
+print(find_duplicate([1,2,2,4])) # 2
+print(find_duplicate([1,2,3,4])) # -1
+print(find_duplicate([1,2,3,3])) # 3
-- 
cgit