text: #pragma once
  
  #include <cstdint>
  
  typedef uint64_t ui64;
  typedef int64_t i64;
  typedef int32_t i32;
  typedef uint8_t ui8;
  
  inline double noise() {
      ui64 r = rand();
      // adjust because RAND_MAX is small and inclusive.
      if (r == RAND_MAX) r--;
      return r / double(RAND_MAX);
  }
  