摘要: 原题再现:3 = 2 + 1 = 1 + 1 + 1 所以3有三种拆法4 = 3 + 1 = 2 + 2 = 2 + 1 + 1 = 1 + 1 + 1 + 1 共五种5 = 4 + 1 = 3 + 2 = 3 + 1 + 1 = 2 + 2 + 1 = 2 + 1 + 1 + 1 = 1 + 1 ... 阅读全文