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#include <iostream>
#include <bitset>

typedef unsigned int uint;

static uint nextPowerOfTwo(uint x) {
  std::bitset<32> a(x);
  std::cout << a << '\n';
  --x;
  a = x;

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#define _POSIX_SOURCE
// If you define this macro, then the functionality from 
// the POSIX.1 standard (IEEE Standard 1003.1) is available
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#undef _POSIX_SOURCE
#include <stdio.h>

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#include <stdio.h>
#include <time.h>
#include <tchar.h>
#define ARRAY_MIN (1024) /* 1/4 smallest cache */
#define ARRAY_MAX (4096*4096) /* 1/4 largest cache */
int x[ARRAY_MAX]; /* array going to stride through */

double get_seconds() { /* routine to read time in seconds */
    __time64_t ltime;
    _time64(&ltime);

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#define _GNU_SOURCE
/*
If you define this macro, everything is included: ISO C89, ISO C99, 
POSIX.1, POSIX.2, BSD, SVID, X/Open, LFS, and GNU extensions.
*/
#define _FILE_OFFSET_BITS 64
/*
This macro determines which file system interface 
shall be used, one replacing the other. 
*/

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#include <stdio.h>
#include <mpi.h>

int main (int argc, char *argv[])
{
    int rank, comm_size;

    MPI_Init(&argc, &argv);
    MPI_Comm_rank(MPI_COMM_WORLD, &rank);
    MPI_Comm_size(MPI_COMM_WORLD, &comm_size);