/******************************************************************************
Welcome to GDB Online.
GDB online is an online compiler and debugger tool for C, C++, Python, PHP, Ruby,
C#, VB, Perl, Swift, Prolog, Javascript, Pascal, HTML, CSS, JS
Code, Compile, Run and Debug online from anywhere in world.
*******************************************************************************/
#include <stdio.h>
#include <iostream>
#include <set>
#include <vector>
int main()
{
std::set<int> s;
std::set<int>::reverse_iterator inv = s.rend();
std::cout << (inv == s.rend()) << "\n";
std::cout << (inv == s.rbegin()) << "\n";
s.insert(5);
std::cout << (inv == s.rend()) << "\n";
std::cout << (inv == s.rbegin()) << "\n";
// invalidate
inv = std::set<int>::reverse_iterator();
std::cout << (inv == s.rend()) << "\n";
std::cout << (inv == s.rbegin()) << "\n";
auto inv2 = std::set<int>::reverse_iterator();
std::cout << (inv == inv2) << "!!!\n";
return 0;
}
