This program illustrates the use of the STL push_heap() algorithm (default
version) to add a value to a (maximum) heap of integers.
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Here are the values in the vector (the heap):
36 19 25 17 3 7 1 2
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Now we add the value 100 to the heap.
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Here are the revised contents of the vector (the new heap):
100 36 25 19 3 7 1 2 17
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