import std.getopt;
import std.stdio;
import std.experimental.ndslice;

int n = 600, l=600, m=600;

void main(string[] args)
{
        auto A = new double [l*m].sliced(l,m);
        auto B = new double [m*n].sliced(m,n);
        auto C = new double [l*n].sliced(l,n);
        A[][] = 0;


        matrix!(typeof(A)).ini(A);

        // matrix!(typeof(A)).print(A);

        // blabla

        matrix!(typeof(A)).ini(B);
        matrix!(typeof(A)).MatMul(A,B,C);
        //
        writeln(C[1,1]);
        writefln("%d   %d ", C.length, C[0].length);
        /*matrix!(typeof(C)).print(C);*/
}


template matrix(T){
        void ini(T mtx){
                for(int i = 0; i <mtx.length; i++) {
                        for(int j = 0; j< mtx[i].length; j++) {
              mtx[i,j] = i*j + 0.6*j +3.4;
                        }
                }
        }

        void print(T mtx){
                for(int i = 0; i <mtx.length; i++) {
                        writefln("%(%8.1f %)", mtx[i]);

                }
        }


        void MatMul(T A, T B, T C){
                C[] = 0;

                for(int k = 0; k < C[0].length; k++) {
                        for(int i = 0; i < C.length; i++) {
                                for(int j = 0; j < A[0].length; j++) {
                  C[i,k] += A[i,j] * B[j,k];
                                }
                        }
                }
        }


}