A map of the town that Annie, Barbara, and Charlie live in can be represented by the Cartesian plane. Annie is located at and Barbara is located at . They agree to meet at the closest point that is equidistant from their current locations and walk upwards together to get to Charlie's location at . How many units upward do Annie and Barbara walk together to get to Charlie?
HHHHHHHHHHHAAAAAAAAAAALLLLLLLLLLLLLLLLLLLPPPPPPPPPPPPPPPPPPP I NOLY HAVE A DAY