def cpto(lvl,cap,goal):
    """
    Function to find out the amount of change points required to reach a level.
    Returns said amount.
    lvl: Starting level, and used as level tracking within function
    cap: The level at which CP required to reach next level stops increasing
    goal: The goal, self-explanatorily.
    """
    tot=0
    while not lvl==goal:
        if lvl<cap:
            tot+=(lvl+1)
            lvl+=1
        else:
            tot+=cap
            lvl+=1
    return tot
print(cpto(0,50,77))