My flag value is not returning false or true as expected

I'm trying to verify is a list of numbers i choose has in all elements diferent numbers. I set a flag variable true if all values in list were diferent and false otherwise. However my function is returning zero and not true or false. I know i inicialize my flag variable at zero because i needed to defined that same variable at the start of the function

i already came up with a code but my function is returning zero. My for sentence is not beeing iterated

v=[]

def creat_function():
    v=[int(input('digit a number\n')) for j in range(0,int(input('number of elements\n')))]
    return v
print(creat_function())

def diferences(v):
    flag=0
    for j in range(0,len(v)):
        if v[j-1]!=v[j]:
            flag=True
        else:
            flag=False
    return flag
print(diferences(v))