hdu 5349 MZL's simple problem 2015多校联合训练赛#5 简单题

MZL's simple problem

Time Limit: 3000/1500 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)
Total Submission(s): 904    Accepted Submission(s): 431

Problem 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  ( N≤106 ),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

简单题，直接模拟即可

#include<iostream>
#include<set>
#include<cstdio>
#include<cstring>
#include<cstdio>
using namespace std;
multiset<int> haha;
multiset<int>::iterator it;
int main(){
    int n;
    while(scanf("%d",&n)!=EOF){
        int p,u;
        haha.clear();
        int ans ;
        while(n--){
            scanf("%d",&p);
            if(p == 1) {
                scanf("%d",&u);
                haha.insert(u);
            }
            else if(p == 2){
                if(haha.size() > 0){
                    haha.erase(haha.begin());
                }
            }
            else if(p==3){
                ans = 0;
                if(haha.size() > 0){
                    it = haha.end();
                    it--;
                    ans = *it;
                }
                printf("%d\n",ans);
            }
        }
    }
    return 0;
}