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MZL's simple problem

Time Limit
2s
Memory Limit
65536KB
Judge Program
Standard
Ratio(Solve/Submit)
100.00%(1/1)
Description:

A simple problem
Problem Description
You have a multiple set,and now there are three kinds of operations:
1 x : add number x to set
2 : delete the minimum number (if the set is empty now,then ignore it)
3 : query the maximum number (if the set is empty now,the answer is 0)

Input:

The first line contains a number N (N106),representing the number of operations.
Next N line ,each line contains one or two numbers,describe one operation.
The number in this set is not greater than 109.

Output:

For each operation 3,output a line representing the answer.

Sample Input:
6
1 2
1 3
3
1 3
1 4
3
Sample Output:
3
4
Source:

2015 Multi-University Training Contest 5


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