#include<stdio.h>
struct point{
    int a;
    int b;
};
int main(){
    int N;
    scanf("%d",&N);
    struct point points[100];
    for(int i=0;i<N;i++){
        scanf("%d%d",&points[i].a,&points[i].b);
        
}    
    printf("%d\n",points[0].a points[2].b);
    return 0;
}