auto save

diy.py

-# 和你的小伙伴用列表讲讲桃园结义的故事，并说说这其中运用了哪些列表知识：
-# 来，我给你起个头~
-# 从前啊，有三个bro，分别是：刘备、关羽、张飞...
-bro1="关羽"
-bro2="刘备"
-bro3="张飞"
-bros=["刘备","关羽","张飞"]
-bro1=["关羽",160,8.5]
-bro2=["刘备",161,9.1]
-bro3=["张飞",166,8.3]
-bros[0]="关羽"
-bros[1]="刘备"
-print(bros)
\ No newline at end of file
+s = input()
+a = s.split()
+lis = [int(i) for i in a]
+
+result = [0]*21
+
+for index in lis:
+    result[index] = 1
+
+max_conse = 0
+now_conse = 0
+
+for index in range(len(result)-3):
+    now_conse = result[index] + result[index+1] + result[index+2] + result[index+3]
+    if now_conse > max_conse:
+        max_conse = now_conse
+
+print(max_conse)