#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <math.h>

/* Include polybench common header. */
#include <polybench.h>

/* Include benchmark-specific header. */
/* Default data type is int, default size is 50. */
#include "dynprog.h"

/* Array initialization. */
static void init_array(int length,
                       DATA_TYPE POLYBENCH_2D(c, LENGTH, LENGTH, length, length),
                       DATA_TYPE POLYBENCH_2D(W, LENGTH, LENGTH, length, length))
{
  int i, j;
  for (i = 0; i < length; i++)
    for (j = 0; j < length; j++)
    {
      c[i][j] = i * j % 2;
      W[i][j] = ((DATA_TYPE)i - j) / length;
    }
}

/* DCE code. Must scan the entire live-out data.
   Can be used also to check the correctness of the output. */
static void print_array(DATA_TYPE out)
{
  fprintf(stderr, DATA_PRINTF_MODIFIER, out);
  fprintf(stderr, "\n");
}

/* Main computational kernel. The whole function will be timed,
   including the call and return. */
static void kernel_dynprog(int tsteps, int length,
                           DATA_TYPE POLYBENCH_2D(c, LENGTH, LENGTH, length, length),
                           DATA_TYPE POLYBENCH_2D(W, LENGTH, LENGTH, length, length),
                           DATA_TYPE POLYBENCH_3D(sum_c, LENGTH, LENGTH, LENGTH, length, length, length),
                           DATA_TYPE *out)
{
  int iter, i, j, k;

  DATA_TYPE out_l = 0;

  for (iter = 0; iter < _PB_TSTEPS; iter++)
  {
    for (i = 0; i <= _PB_LENGTH - 1; i++)
      for (j = 0; j <= _PB_LENGTH - 1; j++)
        c[i][j] = 0;
    for (i = 0; i <= _PB_LENGTH - 2; i++)
    {
      for (j = i + 1; j <= _PB_LENGTH - 1; j++)
      {
        sum_c[i][j][i] = 0;
        for (k = i + 1; k <= j - 1; k++)
          sum_c[i][j][k] = sum_c[i][j][k - 1] + c[i][k] + c[k][j];
        c[i][j] = sum_c[i][j][j - 1] + W[i][j];
      }
    }
    out_l += c[0][_PB_LENGTH - 1];
  }
  *out = out_l;
}

int main(int argc, char **argv)
{
  /* Retrieve problem size. */
  int length = LENGTH;
  int tsteps = TSTEPS;

  /* Variable declaration/allocation. */
  DATA_TYPE out;
  POLYBENCH_3D_ARRAY_DECL(sum_c, DATA_TYPE, LENGTH, LENGTH, LENGTH, length, length, length);
  POLYBENCH_2D_ARRAY_DECL(c, DATA_TYPE, LENGTH, LENGTH, length, length);
  POLYBENCH_2D_ARRAY_DECL(W, DATA_TYPE, LENGTH, LENGTH, length, length);

  /* Initialize array(s). */
  init_array(length, POLYBENCH_ARRAY(c), POLYBENCH_ARRAY(W));

  /* Start timer. */
  polybench_start_instruments;

  /* Run kernel. */
  kernel_dynprog(tsteps, length,
                 POLYBENCH_ARRAY(c),
                 POLYBENCH_ARRAY(W),
                 POLYBENCH_ARRAY(sum_c),
                 &out);

  /* Stop and print timer. */
  polybench_stop_instruments;
  polybench_print_instruments;

  /* Prevent dead-code elimination. All live-out data must be printed
     by the function call in argument. */
  polybench_prevent_dce(print_array(out));

  /* Be clean. */
  POLYBENCH_FREE_ARRAY(sum_c);
  POLYBENCH_FREE_ARRAY(c);
  POLYBENCH_FREE_ARRAY(W);

  return 0;
}