看代码

#include<bits/stdc++.h>
using namespace std;
bool operator < (const pair<int,int> &a, const pair<int,int> &b)
{
    return a.second>b.second;
}
priority_queue<pair<int,int> >q;
int main()
{
    q.push(make_pair(1, 2));
    q.push(make_pair(1,10));
    cout<<q.top().second<<endl;
    printf("%d",make_pair(1, 2)<make_pair(1, 10)); 
}

输出

10
0

虚心求教