IR
1.记得有一道食物中毒的题目。有100人(数字不太记得清了)have dinner,其中**人食物中毒,**%的人吃了appetizers。没有中毒的人里面有吃了appetizers是没吃的三倍。
求吃了appetizers 和 没有吃 appetizers 不难 就计算
2.还有一题POEM的问题 给了一系列条件
POEM Has two lines, Total 15 syllabus;
Each Line contains no more than 9 syllabus;
First syllabus is Streessed for each line;
Syllabus is either Stressed or Unstressed;
Streessed syllabus must be followed by an Unstressed syllabus, but, no more than two, Unstressed syllabus.
最后给已知First line has exactly two Stressed syllabus 问题是求Second line 有多少 Stressed 和 Unstressed syllabus
也是在两个column 里面选吧