You are given nonnegative integers a and b (a ≤ b), and a positive integer x. Among the integers between a and b, inclusive, how many are divisible by x?
a,b,x=map(int,input().split())
print(b//x-a//x)
a,b,x=map(int,input().split())
if a%x>0 and b%x>0:
    print(b//x-a//x)
elif b%x==0 and a%x>0:
    print(b//x-a//x)
else:
    print(b//x-a//x+1)

