// shrink image
//
#include "ppm.h"

int main( void)
{
  ppm a = ppm_read();

  ppm n = ppm_new( a.rows/2, a.cols/2);

  for( int i = 0; i < n.rows; ++i) for( int j = 0; j < n.cols; ++j) {
    n.r[i][j] = a.r[2*i][2*j]; // copy every other pixel
    n.g[i][j] = a.g[2*i][2*j];
    n.b[i][j] = a.b[2*i][2*j];
  }

  ppm_write( n);

  return 0;
}