[#6,7,8]폰켓몬, 완주하지 못한 선수, 전화번호 목록

Author: so-myoung

So-Myoung/1주차/완주하지 못한 선수.py

@@ -0,0 +1,15 @@
+def solution(participant, completion):
+    runner = {}
+
+    for p in participant:
+        if p in runner:
+            runner[p] += 1
+        else:
+            runner[p] = 1
+
+    for c in completion:
+        runner[c] -= 1
+
+    for player, count in runner.items():
+        if count != 0:
+            return player

So-Myoung/1주차/전화번호 목록.py

@@ -0,0 +1,8 @@
+def solution(phone_book):
+    phone_book.sort()
+
+    for i in range(len(phone_book) - 1):
+        if phone_book[i] == phone_book[i + 1][:len(phone_book[i])]:
+            return False
+
+    return True

So-Myoung/1주차/폰켓몬.py

@@ -0,0 +1,2 @@
+def solution(nums):
+    return min(len(nums)/2, len(set(nums)))