This program illustrates the use of the STL includes() algorithm (extended
version) to test whether the values in a second range of (ordered) integer
values in a vector of integers are all present in a first (ordered) range of
integer values, also in a vector of integers. In this case the integers are
ordered in the sense that a first integer precedes a second if and only if
its digit sum is less than the digit sum of the second integer.
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Here are the contents of v1:
11 23 15 8 55 39 96
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Here are the contents of v2:
11 15 39
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v1 includes v2.
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Here are the contents of v3:
14 44 66
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v1 includes v3.
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Here are the contents of v4:
14 44 65
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v1 does not include v4.
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