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#pragma once 
 
#include <cstddef> 
 
namespace NArraySizePrivate { 
    template <class T> 
    struct TArraySize; 
 
    template <class T, size_t N> 
    struct TArraySize<T[N]> { 
        enum { 
            Result = N 
        }; 
    }; 
 
    template <class T, size_t N> 
    struct TArraySize<T (&)[N]> { 
        enum { 
            Result = N 
        }; 
    }; 
} 
 
#define Y_ARRAY_SIZE(arr) ((size_t)::NArraySizePrivate::TArraySize<decltype(arr)>::Result)