CF1200A Hotelier

Amugae有一家10间客房的酒店,房间从左到右从0到9编号。 酒店有两个入口——一个在左端，另一个在右端。当顾客通过左边入口到达酒店时，他们被分配到离左边入口最近的那个空房间。同样，当客户通过右边的入口到达酒店时，他们被分配到离右边入口最近的那个空房间。 一天，Amugae失去了房间分配表单。谢天谢地，Amugae的记忆是完好的，他还记得所有的顾客：顾客什么时候到的，从哪个入口进入的酒店，以及他们什么时候离开酒店。最初这家酒店的房间都是空的。编写一个程序，从Amugae的记忆中恢复房间分配表单。

第一行包含一个整数n（1≤n≤100000），表示Amugae记忆中的事件数。 第二行由一个长度为n的字符串组成，按时间顺序描述事件。其中每个字符含义： “L”：表示客户从左侧入口进入酒店。 “R”：表示客户从右侧入口进入酒店。 '0'、'1'、…、'9'：X房间的客户（分别为0、1、…、 9）离开。 数据保证客户到达时至少有一个空房间，且当X（0，1，…，9）给出时，X房间内有一个客户。并且，所有房间最初都是空的。

一行，输出酒店房间的分配状态，从0房间到9房间。将空房间表示为“0”，占用的房间表示为“1”，没有空格。 **输入输出示例** _**Mubuky's Translation**_

In the first example, hotel room's assignment status after each action is as follows. - First of all, all rooms are empty. Assignment status is 0000000000. - L: a customer arrives to the hotel through the left entrance. Assignment status is 1000000000. - L: one more customer from the left entrance. Assignment status is 1100000000. - R: one more customer from the right entrance. Assignment status is 1100000001. - L: one more customer from the left entrance. Assignment status is 1110000001. - 1: the customer in room $ 1 $ leaves. Assignment status is 1010000001. - R: one more customer from the right entrance. Assignment status is 1010000011. - L: one more customer from the left entrance. Assignment status is 1110000011. - 1: the customer in room $ 1 $ leaves. Assignment status is 1010000011. So after all, hotel room's final assignment status is 1010000011. In the second example, hotel room's assignment status after each action is as follows. - L: a customer arrives to the hotel through the left entrance. Assignment status is 1000000000. - 0: the customer in room $ 0 $ leaves. Assignment status is 0000000000. - L: a customer arrives to the hotel through the left entrance. Assignment status is 1000000000 again. - 0: the customer in room $ 0 $ leaves. Assignment status is 0000000000. - L: a customer arrives to the hotel through the left entrance. Assignment status is 1000000000. - L: one more customer from the left entrance. Assignment status is 1100000000. - R: one more customer from the right entrance. Assignment status is 1100000001. - R: one more customer from the right entrance. Assignment status is 1100000011. - 9: the customer in room $ 9 $ leaves. Assignment status is 1100000010. So after all, hotel room's final assignment status is 1100000010.