Keep Only the Last N

Write a function deque<int> keepLast(const vector<int>& v, int n) that returns a deque holding only the last n elements of v, in their original order. If v has n or fewer elements, all of them are kept. You may assume n >= 1.

The tests print the returned deque separated by spaces. For v = {1, 2, 3, 4, 5} and n = 3 the output is exactly what is shown in Expected Output.

For v = {1, 2} and n = 5 the output is:
1 2

Do NOT write a main function.

Expected Output:

3 4 5↵
1 2↵

= newline. The output ends with a newline — print one after the last line.

Hints4 available

Topics:

STL ContainersQueues

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