#include <hopper.h>
main:
   first matrix=0, second matrix=0,a=-1
   {5,2},rand array(a),mulby(10),ceil, cpy(first matrix), puts,{"\n"},puts
   {2,3},rand array(a),mulby(10),ceil, cpy(second matrix), puts,{"\n"},puts
   {first matrix,second matrix},mat mul, println
exit(0)