哪位大佬帮我看看哪里错了

#include<iostream>
#include<cstdio>
#include<queue>
#define ll long long
using namespace std;

ll n;
priority_queue<ll>mx;
priority_queue<ll,vector<ll>,greater<ll> >mn;

int main()
{
    ll i,j,k,p,q;
    cin>>n>>k;
    mx.push(k);
    cout<<k<<endl;
    for(i=2; i<=n; i+=2)
    {
        scanf("%lld%lld",&p,&q);
        mn.push(max(p,q));
        mx.push(min(p,q));
        while(mx.top()>mn.top())
        {
            k=mx.top();
            mx.pop();
            mx.push(mn.top());
            mn.pop();
            mn.push(k);
        }
        printf("%lld\n",mx.top());
    }
}