#include <stdio.h>
#define for_i(i, range, inner)                                                 \
    {                                                                          \
        int i;                                                                 \
        for (i = 0; i < range; i++)                                            \
            inner;                                                             \
    }

int main() {
    int a[4][4], *p = (int *)a, n, sum = 0;
    scanf("%d", &n);
    for_i(i, 16, p[i] = n + i);
    for_i(i, 4, {
        sum += a[i][i];
        sum += a[i][3 - i];
    });
    printf("%d\n", sum);
    return 0;
}