def is_bad_version(s):
    return s >= v

def first_bad_version(n):

    # Assigning first pointer with the first version that is 1
    first = 1
    # Assigning last pointer with n that is the number of versions
    last = n
    calls = 0
    print("\n\tVersions: ", end="")
    for x in range(first, last):
        print(x, end=", ")
    print(last, "\n")
    print("\tfirst:", first)
    print("\tlast:", last)
    return first, calls

# Driver code


def main():
    global v
    test_case_versions = [38, 13, 29, 40, 23]
    first_bad_versions = [28, 10, 10, 28, 19]

    for i in range(len(test_case_versions)):
        v = first_bad_versions[i]
        print(i + 1,  ".\tNumber of versions: ", test_case_versions[i], sep="")
        first_bad_version(test_case_versions[i])
        print("-"*100)


if __name__ == '__main__':
    main()