#include <ext/hash_map>

#include <math.h>

#include <stdio.h>

using namespace std;

#define FLT_EPSILON 1.192093e-007

#define DBL_EPSILON 2.2204460492503131e-016

#define FLOAT_EPSILON(a,b) ( a > b ? fabs(a) * FLT_EPSILON : fabs(b) * FLT_EPSILON)

#define DOUBLE_EPSILON(a,b) ( a > b ? fabs(a) * FLT_EPSILON : fabs(b) * DBL_EPSILON)

#define float_equal(a, b) (fabs((a)-(b)) <= FLOAT_EPSILON(a,b))

#define double_equal(a, b) (fabs((a)-(b)) <= DOUBLE_EPSILON(a,b))

#define INT64_MAX 0x7fffffffffffffffLL

typedef struct

{

    size_t operator()(const double & dValue) const

    {

        int e =  ;

        double tmp = dValue;

        if (dValue<)

        {

            tmp = -dValue;

        }

        e = ceil (log (dValue));

        return size_t(( INT64_MAX+ 1.0) * tmp * exp (-e));

    }

} hash_double; 

typedef struct

{

    bool operator()(const double &value1,const double &value2) const

    {

        return double_equal(value1,value2);

    }

} hash_double_cmp;  

typedef struct

{

    size_t operator()(const string & str) const

    {

        size_t h=;for(size_t i=;i<str.length();++i)

        {

            h = ( h<< ) - h + str[i];

        }

        return h;

        //return __stl_hash_string(str.c_str());

    }

} hash_string;  

typedef struct

{

    bool operator()(const string &str1,const string &str2) const

    {

        return str1.compare(str2) == ;

    }

} hash_str_cmp;