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Editorial Team

Asked: May 11, 20262026-05-11T07:23:56+00:00 2026-05-11T07:23:56+00:00

I couldn’t find any definitive answer to this question. I suppose most implementation use

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I couldn’t find any definitive answer to this question.

I suppose most implementation use merge sort that is stable but, is the stability a requirement or a side effect?

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2026-05-11T07:23:56+00:00Added an answer on May 11, 2026 at 7:23 am
C++ Standard ISO/IEC 14882:2003 says:

23.2.2.4/31

Notes: Stable: the relative order of the equivalent elements is preserved. If an exception is thrown the order of the elements in the list is indeterminate.
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