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

#define x first
#define y second
typedef pair<int,int> PII;
struct cmp{
    bool operator()(PII a, PII b)
    {
        if(a.x!=b.x) return a.x>b.x;
        else return a.y>b.y;
    }
};

PII p[5] = {{3,3},{3,1},{5,1},{5,0},{1,10}};
int main()
{
    priority_queue<PII,vector<PII>,cmp> q;
    for(int i = 0; i<5; i++) q.push(p[i]);
    for(int i = 0; i<5; i++)
    {
        PII tmp = q.top();
        q.pop();
        cout<<tmp.x<<" "<<tmp.y<<endl;
    }
}