文件（1）：字符串缩写，删掉空格，首字母大写，去掉少于三个字符的单词，and写为&

文件（2）；用某段字符替换另一段字符，分对大小写敏感和不敏感两种情况

文件（3）；利用动态规划方法实现最长不减子序列

文件（4）；有趣的数灯问题，每每查到某数的倍数或者以某数结尾的数字都熄灯并从头再查起，直到全部熄灭为止

文件（5）；结构体的实际应用问题，为学生排奖学金，如果总分相同，依此按数学语文英语最高选择-Files (1): String abbreviation, delete spaces, the first letter capitalized, remove the words less than three characters, and written as &　File (2)　replace another section of characters with a certain character, and points are case sensitive In both cases insensitive file (3)　using dynamic programming methods to achieve the longest sequence unabated file (4)　interesting few lights problem, often found in multiples of a number or a number to the end of the figures are lights out and start from scratch then check on, until all extinguished file (5)　practical application structure, ranked scholarships for students, if the same score, so choose according to mathematical language English High