优先队列

//定义结构,使用运算符重载,自定义优先级1  
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  
    }  
};  
//定义结构,使用运算符重载,自定义优先级2  
struct number1{  
    int x;  
    bool operator < (const number1 &a) const {  
        return a.x<x;//最小值优先  
    }  
};  
struct number2{  
    int x;  
    bool operator < (const number2 &a) const {  
        return a.x>x;//最大值优先  
    }  
};  


  priority_queue<int>que;//采用默认优先级构造队列  
  
    priority_queue<int,vector<int>,cmp1>que1;//最小值优先  
    priority_queue<int,vector<int>,cmp2>que2;//最大值优先  
  
    priority_queue<int,vector<int>,greater<int> >que3;//注意“>>”会被认为错误,  
                                                      //这是右移运算符,所以这里用空格号隔开  
    priority_queue<int,vector<int>,less<int> >que4;////最大值优先  
  
    priority_queue<number1>que5;  
priority_queue<number2>que6;

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