离散数学 证明题Assume that a chocolate bar consists of n squares ar

离散数学 证明题
Assume that a chocolate bar consists of n squares arranged in a rectangular pattern. The bar can only be broken along vertical or horizontal lines separating the squares. (Think of a Hershey’s bar.)
Assuming that only one piece can be broken at a time, determine how many breaks you must make in order to break the bar into n squares. Use induction to prove your answer iscorrect.
（翻译）
假设我有一块长方形巧克力,它有N个小块组成.我每次只能横着（水平）,或者竖着（垂直）的去掰它.假设,一次只能掰一块下来,想要把它掰成N块,请问要多少掰次?并且用归纳法去证明它的正确.