#include <stdio.h>
#include <stdint.h>
    static uint8_t data[256];
    static int index;
 
    void init_random()
    {
      srand(NULL);
 
      index = 0;
      for (int i = 0; i < 256; ++i)
        data[i] = i;
 
      // bad choice, use fisher-yates for example
      for (int i = 0; i < 10000; ++i)
      {
        int i1 = rand()%256, i2 = rand()%256;
        uint8_t t = data[i1];
        data[i1] = data[i2];
        data[i2] = t;
      }
    }
 
    uint8_t extract()
    {
      return data[index++];
    }
 
 
int main(void) {
	init_random();
	for (int i = 0; i < 100; ++i)
	  printf("%d\n", extract());
}
 

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