Čokolada

A new type of chocolate arrived in the local shop. The chocolate comes in bars, each bar consisting of N squares. Bars are factory made and only come in sizes which are full powers of two. In other words a single bar has 1, 2, 4,8, 16, ... squares.To fully asses the quality of chocolate Mirko must sample at least K squares.His friend Slavko would also like to try some of the chocolate. Since Mirko is in a hurry to try the chocolate himself, he decides to break the bar he bought in pieces, such that he has exactly K squares, and leaves the rest (if any)to Slavko. The bars are a bit brittle, so Mirko can break them only on their exact center. In other words, from one bar with D squares, he can get two bars with D/2 squares.Write a program that will determine the minimal number of breaks Mirko must perform in order to obtain exactly K squares (not necessarily in one piece). Also, determine the smallest bar size Mirko must buy in order to have at least K squares.