Ответы на вопрос:
ok = True
prev = int(input())
cur = prev
while True:
cur = int(input())
if cur == 0:
break
if (cur > 0 and prev > 0) or (cur < 0 and prev < 0):
ok = False
prev = cur
if ok:
print("YES")
else:
print("NO")
Популярно: Информатика
-
bgi43206.07.2022 03:07
-
Myziki28.07.2020 04:27
-
keniwo22.09.2020 10:55
-
LeenBoom6929.12.2020 13:37
-
bpanraw08.04.2021 22:53
-
Ehsusfmivwxjswbj29.11.2022 14:45
-
SAVAAVAAS05.04.2023 13:50
-
DashkaGamayunova30.11.2020 01:22
-
lililobanova2004.04.2022 20:28
-
ENGPrO29.10.2021 14:27