#include <fstream>
#define DIM 1000010
#define f first
#define s second
using namespace std;

ifstream fin ("date.in" );
ofstream fout("date.out");

int N, M, i, j, K, ok, minim;
pair <int , int > V[DIM], W[DIM];

void SetUp(){
    fin >> N;
    for(i = 1; i <= N; i ++)
        fin >> W[i].f >> W[i].s;
    for(i = 1; i <= N; i ++){
        for(j = i+1; j <= N; j ++){
            X1 = W[i].f;
            X2 = W[j].f;
            Y1 = W[j].s;
            Y2 = W[j].s;
            if(Y1 > Y2){
                aux = X1;
                X1 = X2;
                X2 = aux;
                aux = Y1;
                Y1 = Y2;
                Y2 = aux;
            }
            X2 -= X1;
            X1 = 0;
            Y2 -= Y1;
            Y1 = 0;
            M ++;
            V[M].f = X2;
            V[M].s = Y2;
        }
    }
    return;
}

void CodeExpert(){

    return;
}

int main(){
    SetUp();
    CodeExpert();
    return 0;
}