3.3 Combinatorial Problems 1. combinatories组合数学 A branch of mathematics related to probability and statistics, involves the study/of counting, grouping, and arrangement of finite sets of elements 有关概率和统计的一个数学分支,研究对元素的有 限集合的计算、分组和排列。 2. counter计数器 counting loop计数循环7 3.3 Combinatorial Problems 1. combinatorics 组合数学 A branch of mathematics related to probability and statistics, involves the study of counting, grouping, and arrangement of finite sets of elements. 有关概率和统计的一个数学分支，研究对元素的有 限集合的计算、分组和排列。 2. counter 计数器 counting loop 计数循环