Arranging bangles

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Seema has a lot of bangles all stored in a box. Bangles are of different size, colors and make. She has a habit of buying bangles as pairs. She wants to pile them by sizes in such a way that the maximum sized the bangles are in the middle and the following sizes will have the placed beside each bangle. For eg four bangles with sizes 7 (one pair), 8 (one pair) will be placed as 7, 8, 8, 7. If there

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solution.cppC++17

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