queueMystery1

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Language/Type: C++ stack collections STL

What is the output of the following code?

queue queue;
for (int i = 1; i <= 6; i++) {
    queue.push(i);
}                             // {1, 2, 3, 4, 5, 6}

for (int i = 0; i < queue.size(); i++) {
    cout << queue.pop() << " ";
}
cout << queue << "  size " << queue.size() << endl;

output
`1 2 3 4 5 6 {} size 0` `1 2 3 {4, 5, 6} size 3` `1 2 3 4 5 6 {1, 2, 3, 4, 5, 6} size 6` `other`

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