import java.util.*;

class Point{

int x,y;

public Point(int x, int y){

this.x = x;

this.y = y;

}

}

public class Main{

public static void main(String[] args){

Scanner sc = new Scanner(System.in);

int n = sc.nextInt();

int x = 0, y = 0;

Point[] points = new Point[n];

for(int i = 0 ; i < n ; i++){

x = sc.nextInt();

points[i] = new Point(x, sc.nextInt());

}

Arrays.sort(points, new Comparator<Point>(){

public int compare(Point arg1, Point arg2) {

// TODO Auto-generated method stub

return arg2.x -arg1.x;

}

});

int maxY = -1;

for (int i = 0 ; i < n; i++){

if(points[i].y > maxY){

maxY= points[i].y;

System.out.println(points[i].x+" "+points[i].y);

}

}

}

}