From a4889d83439b8c9b9d877d14401fa2659698fd0f Mon Sep 17 00:00:00 2001
From: huisuu <kimhuisu005791@gmail.com>
Date: Tue, 13 Aug 2024 12:33:54 +0900
Subject: [PATCH] 23.py

---
 HSKIM/21to30/23.py | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 HSKIM/21to30/23.py

diff --git a/HSKIM/21to30/23.py b/HSKIM/21to30/23.py
new file mode 100644
index 0000000..b770d89
--- /dev/null
+++ b/HSKIM/21to30/23.py
@@ -0,0 +1,31 @@
+def solution(genres, plays):
+    answer = [ ]
+    genres_dic = { }
+    plays_dic = { }
+
+    for i in range(len(genres)):
+        genre = genres[i]
+        play = plays[i]
+
+        if genre in genres_dic:
+            genres_dic[genre] = []
+            plays_dic[genre] = 0
+
+        genres_dic[genre].append((i, play))
+        plays_dic[genre] += play
+
+    print(genres_dic, plays_dic)
+    
+    sorted_genres = sorted(plays_dic.items( ) , key=lambda x: x[1], reverse=True)
+
+    # (장르, 재생 횟수) 형태의 튜플로 구성된 리스트일 때, 반복문에서 두 번째 값을 사용하지 않겠다는 의미로 _가 사용
+    for genre, _ in sorted_genres:
+        sorted_songs = sorted(genres_dic[genre], key=lambda x: (-x[1], x[0])) 
+        # append와 달리 리스트에 여러 개의 요소를 한 번에 추가할 수 있음 
+        answer.extend([i for i, _ in sorted_songs[:2]])
+
+
+# g = ["classic", "pop", "classic", "classic", "pop"]
+# p = [500, 600, 150, 800, 2500]
+
+# print(solution(g, p))