priority_queue用法总结

#include<bits/stdc++.h>
#include<queue>
using namespace std;
struct cmp1{
	bool operator()(int a,int b){
		return a>b;//最小值优先 
	}
};
struct cmp2{
	bool operator()(int a,int b){
		return a<b;//最大值优先 
	}
}; 
struct  Node1{
	int x;
	bool operator<(const Node1& b)const{
		return x>b.x;//最小值优先 
	}
} ;
struct Node2{
	int x;
	bool operator<(const Node2& b)const {
		return x<b.x;//最大值优先 
	}
}; 
int main(){
	priority_queue<int> q0;	//默认优先级，也就是最大优先
	
	priority_queue<int,vector<int>,cmp1> q1;
	priority_queue<int,vector<int>,cmp2> q2;
	
	priority_queue<int,vector<int>,less<int> > q3;//小于仍旧是小于，最大值优先 
	priority_queue<int,vector<int>,greater<int> > q4;//最小值优先 

	priority_queue<Node1> q5;//最小值优先  
	priority_queue<Node2> q6;//最大值优先  
}