/*
 * This template is valid both in C and in C++,
 * so you can expand it with code from both languages.
 */

#include <stdio.h>
#include <assert.h>

// constraints
#define MAXN 1000000

// input data
int N, i;
int X[MAXN], Y[MAXN];

int main() {
//  uncomment the following lines if you want to read/write from files
//  freopen("input.txt", "r", stdin);
//  freopen("output.txt", "w", stdout);

    assert(1 == scanf("%d", &N));
    for (i=0; i<N; i++)
        assert(2 == scanf("%d %d", &X[i], &Y[i]));

    // insert your code here
    long long area = 42; // change 42 with actual answer
    printf("%lld\n", area);
    return 0;
}