Buggy python submission (verdict: Runtime Error):
# cording: utf-8
import math
num = input().split(" ")
a = int(num[0])-1
b = int(num[1])
c = int(num[2])
d = int(num[3])
e = int(c * d / int(math.gcd(c, d)))
bb = b - (b//c) -(b//d) +(b//e) 
aa = a - (a//c) -(a//d) + (a//e)
print(int(bb-aa))

Fixed submission:
def gcd(a, b):
    while b!=0:
        a, b = b, a%b
    return a

num = input().split(" ")
a = int(num[0])-1
b = int(num[1])
c = int(num[2])
d = int(num[3])
e = int(c * d / int(gcd(c, d)))
bb = b - (b//c) -(b//d) +(b//e) 
aa = a - (a//c) -(a//d) + (a//e)
print(int(bb-aa))

Buggy python submission (verdict: Runtime Error):
import math
num = input().split(" ")
a = int(num[0])-1
b = int(num[1])
c = int(num[2])
d = int(num[3])
e = int(c * d / int(math.gcd(c, d)))
bb = b - (b//c) -(b//d) +(b//e) 
aa = a - (a//c) -(a//d) + (a//e)
print(int(bb-aa))

Fixed submission:
def gcd(a, b):
    while b!=0:
        a, b = b, a%b
    return a

num = input().split(" ")
a = int(num[0])-1
b = int(num[1])
c = int(num[2])
d = int(num[3])
e = int(c * d / int(gcd(c, d)))
bb = b - (b//c) -(b//d) +(b//e) 
aa = a - (a//c) -(a//d) + (a//e)
print(int(bb-aa))

Buggy python submission (verdict: Runtime Error):
import math
num = input().split(" ")
a = int(num[0])-1
b = int(num[1])
c = int(num[2])
d = int(num[3])
e = c * d // int(math.gcd(c, d))
bb = b - (b//c) -(b//d) +(b//e) 
aa = a - (a//c) -(a//d) + (a//e)
print(int(bb-aa))

Fixed submission:
def gcd(a, b):
    while b!=0:
        a, b = b, a%b
    return a

num = input().split(" ")
a = int(num[0])-1
b = int(num[1])
c = int(num[2])
d = int(num[3])
e = int(c * d / int(gcd(c, d)))
bb = b - (b//c) -(b//d) +(b//e) 
aa = a - (a//c) -(a//d) + (a//e)
print(int(bb-aa))

Buggy python submission (verdict: Runtime Error):
import math
num = input().split(" ")
a = int(num[0])-1
b = int(num[1])
c = int(num[2])
d = int(num[3])
e = c * d // int(math.gcd(c, d))
aaa = b - (b//c) -(b//d) +(b//e) -(a -(a//c) -(a//d) + (a//e))
print(int(aaa))

Fixed submission:
def gcd(a, b):
    while b!=0:
        a, b = b, a%b
    return a

num = input().split(" ")
a = int(num[0])-1
b = int(num[1])
c = int(num[2])
d = int(num[3])
e = int(c * d / int(gcd(c, d)))
bb = b - (b//c) -(b//d) +(b//e) 
aa = a - (a//c) -(a//d) + (a//e)
print(int(bb-aa))

Buggy python submission (verdict: Runtime Error):
import math
num = input().split(" ")
a = int(num[0])-1
b = int(num[1])
c = int(num[2])
d = int(num[3])
e = math.gcd(c, d)
x = b - (b//c) -(b//d) +(b//(c*d/e)) -(a -(a//c) -(a//d) + a//(c*d/e))
print(int(x))

Fixed submission:
def gcd(a, b):
    while b!=0:
        a, b = b, a%b
    return a

num = input().split(" ")
a = int(num[0])-1
b = int(num[1])
c = int(num[2])
d = int(num[3])
e = int(c * d / int(gcd(c, d)))
bb = b - (b//c) -(b//d) +(b//e) 
aa = a - (a//c) -(a//d) + (a//e)
print(int(bb-aa))

Buggy python submission (verdict: Runtime Error):
import math
num = input().split(" ")
a = int(num[0])-1
b = int(num[1])
c = int(num[2])
d = int(num[3])
x = b - (b//c) -(b//d) +(b//(c*d//math.gcd(c, d))) -(a -(a//c) -(a//d) + a//(c*d//math.gcd(c, d)))
print(x)

Fixed submission:
def gcd(a, b):
    while b!=0:
        a, b = b, a%b
    return a

num = input().split(" ")
a = int(num[0])-1
b = int(num[1])
c = int(num[2])
d = int(num[3])
e = int(c * d / int(gcd(c, d)))
bb = b - (b//c) -(b//d) +(b//e) 
aa = a - (a//c) -(a//d) + (a//e)
print(int(bb-aa))

Buggy python submission (verdict: Runtime Error):
num = input().split(" ")
a = int(num[0])
b = int(num[1])
c = int(num[2])
d = int(num[3])
print(b - b // c - b // d + b // (c * d) -(a - a // c - a // d + a // (a // (c * d)))

Fixed submission:
def gcd(a, b):
    while b!=0:
        a, b = b, a%b
    return a

num = input().split(" ")
a = int(num[0])-1
b = int(num[1])
c = int(num[2])
d = int(num[3])
e = int(c * d / int(gcd(c, d)))
bb = b - (b//c) -(b//d) +(b//e) 
aa = a - (a//c) -(a//d) + (a//e)
print(int(bb-aa))