reverse_iterator ritr=v.rbegin();

#include <iostream>
#include<vector>
using namespace std;
int main()
{
vector<char> v{'j','a','v','a'};
vector<char>::reverse_iterator rtr;
for(rtr=v.rbegin();rtr!=v.rend();rtr++)
std::cout<< *rtr;
return 0;
}

avaj