diff options
| -rw-r--r-- | challenge-208/conor-hoekstra/ch-02.bqn | 4 | ||||
| -rw-r--r-- | challenge-208/conor-hoekstra/ch-02.py | 9 |
2 files changed, 13 insertions, 0 deletions
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 |