Write a program that lets you know if you can have a key or not, based on your role at the school.
First ask for the user’s role at the school. They can be a student, administrator, or a teacher. (And remember that capitalization is important! ‘Student’ is not the same as ‘student’.)
Example 1: Administrator or Teacher
For example, if this was the input:
Are you an administrator, teacher, or student?: teacher
This should be the output:
Administrators and teachers get keys!
Example 2: Student
And if this was the input:
Are you an administrator, teacher, or student?: student
This should be the output:
Students do not get keys!
(Note: You should also be able to handle a situation where the user enters a value other than administrator, teacher or student and tell them they must be one of the three choices!)
Example 3: Other
If they input anything else:
Are you an administrator, teacher, or student?: secretary
This should be the output:
You can only be an administrator, teacher, or student!
Ответ:
len(a) = 10
a[1] + a[3] = 6
Объяснение:
Можно спокойно проверить кодом на питоне, если первая длина списка можно найти как длину отрезка [1,10], т.е. = 10 -1 + 1, а значение a[1] + a[3] тоже легко найти, a[1]=2(т.к в питоне нумерация индексов с 0) , a[3] = 4