double S,R,i,j,k,L,M,N;
    double a,b,c,d,f;
    double x,y,z;
    S = 0; R = 0;
    for (i = L; i >= 1; i--)
    {
        for (j = M; j >= 1; j--)
        {
            for (k = N; k >= 1; k--)
            {
                if (a * i*j + b * k*i+ b*k*j + b*k*j + d*i*k+c*i*j  + f <= P)
                {
                    S = i * j * k;
                    if (S > R)
                    {
                        R = S;
                        x = i;
                        y = j;
                        z = k;
                    }
                }
            }
        }
    }