#include <cstdarg>
#include <cstdint>
#include <cstdlib>
#include <ostream>
#include <new>

struct CStorage;

struct CPosition {
  int32_t _0;
  int32_t _1;
};

extern "C" {

CStorage *storage_new(uint32_t grid_size);

bool storage_at(const CStorage *storage, int32_t i, int32_t j);

void storage_deposit(CStorage *storage, int32_t i, int32_t j, uint8_t val);

CPosition walk(uint32_t d, int32_t i, int32_t j);

} // extern "C"