// NOTE: it is recommended to use this even if you don't understand the following code.

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

// constraints
#define MAXN 200000

// input data
int N, i;
int A[MAXN];
int B[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", &A[i], &B[i]));
    }

    // insert your code here

    printf("%d\n", 42);  // print the result
    return 0;
}