отрезок

x1, y1,x2,y2 = map(int, input().split())

def nod(a, b):

--if b > 0:

----return nod(b, a%b)

--else:

----return a

a = abs(x1 - x2)

b = abs(y1 - y2)

d = nod(a, b)

print(d * (a//d + b//d - 1))

уравнение

def gcd(a, b):

----while a != 0 and b != 0:

--------if a < b:

------------b = b % a

--------else:

-----------a = a % b

----return a + b

 def qwer(a, b):  

----x = 1  

----x1 = 0

----y = 0

----y1 = 1

----while b != 0:

--------q = a // b

--------r = a % b

--------x2 = x - q * x1

--------y2 = y - q * y1

--------a, b = b, r

--------x, x1 = x1, x2

--------y, y1 = y1, y2

----return str(a), str(x), str(y)

a, b, c = list(map(int, input().split()))

x, y = 0, 0

gcds = 0

if c % gcd(a, b) != 0:

----print('-1')

else:

----gcds, x, y = map(int, qwer(a, b))

----x *= c // gcds

----y *= c // gcds

----q = x // (b // gcds)

----x %= b // gcds

----y += a // gcds * q

----print(x, y)