#include 
#include 
#include 

int retval() { return rand() % 5; }

int main() {
  int a = 0, b = 0, c = 0, d = 0, z = 0, p = 0, m = 0, n = 0,
      arr[5] = {0, 0, 0, 0, 0};
  srand(time(NULL));
  for (int i = 0; i < rand() % 500; i++) {
    if (i % 5 == 0) {
      for (int j = 0; j < 1000; j++) {
        if (rand() % 100 == 10) {
          a = b + 1;
          std::cout