Rsa97

for (int i = 0; i < 255; i++) {
  arr[i / 16] = (arr[i / 16] & ~(1 << (i % 16))) | (func(i) << (i % 16));
}

int main(void)
{
  DDRD = 0xFF;
  PORTD = 0x00;
  char position = 0;
  char step = -1;
  while(1) {
    PORTD = (1 << position);
    if (0 == position || 7 == position) {
      step = -step;
    }
    position += step;
    _delay_ms(200);
  } 
}

(z[i].n / z[j].n) = (z[i].m / z[j].m) = (z[i].o / z[j].o)

(z[i].n / z[j].n) = (z[i].m / z[j].m) => ((z[i].n * z[j].m) / (z[i].m * z[j].n)) = 1
(z[i].n / z[j].n) = (z[i].o / z[j].o) => ((z[i].n * z[j].o) / (z[i].o * z[j].n)) = 1

abs(((z[i].n * z[j].m) / (z[i].m * z[j].n)) - 1) < epsilon && 
abs((z[i].n * z[j].o) / (z[i].o * z[j].n)) - 1) < epsilon

union {
  uint8_t  u8[8];
  uint64_t u64;
} var;

uint8_t var[8];
*((uint64_t *)var);

uint64_t var;
((uint_8 *)&var)[0];
((uint_8 *)&var)[7];

#pragma pack(push,1)
typedef _websocketPacket {
  unsigned char one; // здесь ваша 1
  unsigned char indexElement;
  unsigned char rest[18];
} wsPacket;
#pragma pack(pop)
wsPacket myData;

void wrInt(int val) {
  int l = 1, v = val;
  if (v < 0) {
    write(1, "-", 1);
    v = -v;
  }
  while ((v = v/10) > 0)
    l *= 10;
  while (l > 0) {
    v = val % l;
    ft_putchar(v + '0');
    val -= v*10;
    l /= 10;
  }
}