std::vector

Brief

This is by far the best container! It can do everything and is also the most performant in almost all situations.
If you use another container than std::vector you must have a very strong reason to do so! Most notably, even if std::list has a better algorithmic complexity for some operations, in most cases std::vector will still be faster in practice because it has better cache coherency (the data is grouped together in memory, which makes it much faster to access).

Initializer-list syntax

Instead of

std::vector<int> v;
v.push_back(1);
v.push_back(7);
v.push_back(4);
v.push_back(12);

you can write

std::vector<int> v{1, 7, 4, 12};

These are totally equivalent. And by the way this syntax works for all the containers, not only std::vector.