from median_of_stream import MedianOfStream

def main(input_1, input_2):
    result = []
    median_num = MedianOfStream()
    result.append(None)
    for i in range(1, len(input_1)):
        if input_1[i] == "insert_num":
            median_num.insert_num(input_2[i][0])
            result.append(None)
        elif input_1[i] == "find_median":
            res = median_num.find_median()
            result.append(res)

    return result