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

int main(int argc, char **argv)
{
    long i;
    long j = 128l*1024l*1024l*((long) atoi(argv[1]));
    long k;
    long *s;

    if (!(s = (long *) malloc((size_t) sizeof(long)*j))) {
      fprintf(stderr, "Out of memmory.\n");
      exit(1);
    }

    for (i = 0; i < j; i++) {
      s[i] = (long) i;
    }

    for (i = 0; i < j; i++) {
      k += s[i];
    }

    fprintf(stdout, "%ld\n", k);

    return 0;
}