P3378 用数组做堆。。。

#include<iostream>
#include<algorithm>
using namespace std;

int n;
int c=1;
int d=1;
int v[1000010]={};
int main(){
	cin >> n;
	for(int i = 1;i <= n;i++){
		int a,b;
		cin >> a;
		if(a == 1){
			cin >> b;
			v[c] = b;
			c++;
		}
		else if(a == 2){
			sort(&v[d],&v[c]);
			cout << v[d] << endl;
		}
		else{
			v[d] = 0;
			d++;
		}
	}
	return 0;
}