#include <iostream>
#include <iomanip>

using namespace std;

unsigned long long happy(unsigned int n, unsigned int base)
{
    if (n%2 || n < 2 || base < 2) throw runtime_error("Wrong data");
    auto N = [](unsigned int n, unsigned int k,
                unsigned int base, auto&&N)
    {
        if (n == 1) return (unsigned long long)(k < base);
        unsigned long long s = 0;
        for(unsigned int l = 0; l < base; ++l) s += N(n-1,k-l,base,N);
        return s;
    };
    unsigned long long s = 0;
    for(unsigned int k = 0; k <= (base-1)*n/2; ++k)
    {
        auto m = N(n/2,k,base,N);
        s += m*m;
    }
    return s;
}

int main(int argc, char * argv[])
{
    cout << 13*happy(12,13) << endl;
}