#include<stdio.h>
struct point{
    int x,y;
    
};
void foo(struct point a[],int n){
    if (n>=1){
        printf("%d ",a[0].x);
    }
    if(n>=3){
        printf("%d",a[2].y);
    }
}
int main(){
    int N;
    scanf("%d",&n);
    struct point p[N];
    for (int i=0;i<N;i++)
    {
        scanf("%d %d",&p[i].x),&p[i].y);
    }
    foo(p,N);
    return 0;
}