CareerCup

It is tagged C++.

If size is zero, the return value depends on the particular library implementation (it may or may not be a null pointer), but the returned pointer shall not be dereferenced.

It is equals to CROSS JOIN

int HashFunc1 (const char* s, int size)
{
  unsigned int h = (unsigned int)strlen(s);
  int step = (int)((h>>5)+1);
  
  for (int i=h; i>=step; i-=step)
    h = h ^ ((h<<5)+(h>>2)+(unsigned char)(s[i-1]));
  
  return h%(size-1);
}