La Adivinanza de la Semana

Esta semana nuestra adivinanza es muy popular, si lo piensas, seguro que la conoces de antes. A farmer must transport his dog, a duck, and a bag of corn across a river. The boat he has to use is very small-so small that he can take only one of the three in the boat with him at a time. If he leaves the dog alone with the duck, the dog will kill and eat the duck. If he leaves the duck alone with the corn, the duck will eat up the corn. What is the least number of trips the farmer must make to transport all three across the river safely ¡Buena Suerte!