Ticket Line Simulation

Simulate a ticket line with a queue<string>. Read commands from standard input, one per line, until the input ends. There are two kinds of command:

arrive NAME - the person NAME joins the back of the line (prints nothing)
serve - the person at the front of the line is served and leaves

For every serve command print exactly one line: Serving NAME (for example Serving Bob) if someone is waiting, or Nobody waiting if the line is empty.

Example input:
arrive Bob
serve
serve

The output for that input is shown in Expected Output.

Expected Output:

Serving Bob↵
Nobody waiting↵
Serving Ann↵
Serving Cara↵
Serving Dan↵
Nobody waiting↵

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

Hints4 available

Topics:

STL ContainersQueues

Code Editor

Tab to indent (Esc then Tab to move on) · Ctrl+Enter to run · Shift+Alt+F to format · Ctrl+Space to expand shortcuts (cout, fori)

Your Output

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Test Cases

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