#1-----------------------------------------------------
x = int(input())
if x > 0:
    print(x)
elif x < 0:
    print(-x)
else:
    print("введён 0")
#2-----------------------------------------------------
x = int(input())
y = int(input())
if x > 0:
    if y > 0:
        print("первая четверть")
    else:
        print("четвёртая четверть")
else:
    if y > 0:
        print("вторая четверть")
    else:
        print("третья четверть")
#3-----------------------------------------------------
a = int(input())
b = int(input())
if a % 10 == 0 or b % 10 == 0:
    print("да")
else:
    print("нет")

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