#include <iostream>
#include <string>
#include <hash_map.h>
using namespace std;

/** BEGIN FIX **/
namespace std                                                                                 
{                                                                                             
  template<> struct hash< std::string >                                                       
  {                                                                                           
    size_t operator()( const std::string& x ) const                                           
    {                                                                                         
      return hash< const char* >()( x.c_str() );                                              
    }                                                                                         
  };                                                                                          
}          
/** END FIX **/

hash_map <string, int> months;
int main(void) {
   months["january"] = 31;
   months["february"] = 28;
   return 0;
}