def run_length_decode(in_array):
    """A function to run length decode an int array.
    :param in_array: the input array of integers
    :return the decoded array"""
    switch=False
    out_array=[]
    for item in in_array:
        if switch==False:
            this_item = item
            switch=True
        else:
            switch=False
            out_array.extend([this_item]*int(item))
    return out_array