Vectors/Parity

[edna]

Hey! Can anyone help me with the following: how to make a function which from vector of integers finds and removes all numbers whose digits are of the same "parity" (eg. 351, 246) but without the usage of helping vectors, arrays and without the use of function("erase") or functions from "algorithm" bibl.?
Thanks :)

[Moschops]

Go through the vector. At each element, if the digits are of the same parity, copy everything following in the vector one element to the left. This overwrites the element you want eliminated.

Keep track of how many you overwrite. When finished, resize the vector to (original_size - number_overwritten). Done, without having used "erase", any algorithms or any more vectors.