#define N 512
#define max(x,y) (x) >= (y)? (x) : (y)
#define min(x,y) (x) <= (y)? (x) : (y)
int c_X[N];
int x_max;
int x_min;
extern int nx;

void foo (int n)
{
  int i, x;
  int xmin, xmax;
  int xmin_edge, xmax_edge;

  x = c_X[0];
  xmin = xmax = x;
  xmin_edge = xmax_edge  = 1;
#pragma omp simd safelen(8)
  for (i = 1; i<n; i++) {
    x = c_X[i];
    x = max(min(x,nx),1);
    if (x == xmin) {  
       xmin_edge++;
    }
    if (x == xmax) {
       xmax_edge++;
    }
    else if (x < xmin) {
       xmin = x;
       xmin_edge = 1;
    }
    else if (x > xmax) {
       xmax = x;
       xmax_edge = 1;
    }

  }
    x_max = xmax_edge;
    x_min = xmin_edge;
}