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

/* select 1-byte alignment for everything */
#pragma pack(1)

typedef struct step {
  char mode;
  double height;
} step_t;

/* resume default alignments */
#pragma pack()


void stack_all(step_t *steps, int num_steps) {
  int i, j;

  for (i = 0; i < num_steps; i++)
    for (j = i + 1; j < num_steps; j++)
      steps[i].height += steps[j].height;
}

step_t *make_steps(int num_steps) {
  int i;
  step_t *steps = (step_t *)malloc(sizeof(step_t) * num_steps);

  for (i = 0; i < num_steps; i++) {
    steps[i].mode = 0;
    steps[i].height = 1.0;
  }

  return steps;
}

int main()
{
  int num_steps = 50000;
  step_t *steps;

  printf("%ld\n", sizeof(step_t));

  steps = make_steps(num_steps);
  stack_all(steps, num_steps);
  printf("%f %f\n", steps[0].height, steps[num_steps-1].height);
  return 0;
}