duvida

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

struct info{
    int a;
    long long int b;

    bool operator<(const info &i1, const info &i2) const{
        return i1.a < i2.a;
    }
};

info cr(int a, long long int b){
    info tmp;
    tmp.a = a; tmp.b = b;
    return tmp;
}
int main(){
    priority_queue<info> q;
    q.push(cr(1, 22));
}