This program illustrates the use of the STL search_n() algorithm (default
version) to find instances of a consecutive sequence of identical values in
a vector of integers.
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Here are the contents of the vector:
1 2 9 9 9 9 4 5 6 7 9 9 9 10 11
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The first instance of three consecutive 9's begins at location 3.
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The next instance of three consecutive 9's begins at location 4.
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The next instance of three consecutive 9's begins at location 11.
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No further instance of three consecutive 9's was found in the vector.
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