如何在保持使用算法的原始排序的同时从未排序的std :: vector中删除重复项？

I have an array of integers that I need to remove duplicates from while maintaining the order of the first occurrence of each integer. I can see doing it like this, but imagine there is a better way that makes use of STL algorithms better? The insertion is out of my control, so I cannot check for duplicates before inserting.I have an array of integers that I need to remo