cpp/algorithm/includes

Returns if the sorted range  is a  of the sorted range  (a subsequence need not be contiguous).

@1@ Both ranges must be sorted with. @3@ Both ranges must be sorted with the given comparison function. @2,4@ Same as, but executed according to.

Return value
if is a subsequence of ; otherwise.

Complexity
At most comparisons, where
 * is and
 * is.