next_permutation

min_element

template <class ForIter>    ForIter min_element(ForIter start, ForIter end); template <class ForIter, class Comp>     ForIter min_element(ForIter start, ForIter end, Comp cmpfn); 

The min_element( ) algorithm returns an iterator to the minimum element within the range start and end.

The second form allows you to specify a comparison function that determines when one element is less than another.