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)
输入解释
The first line contains a number $N$ ($N\leq 10^6$),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 $10^9$.
输出解释
For each operation 3,output a line representing the answer.