#include <iostream>
#include <set>

std::set<int> data;

int main(int argc, char** argv)
{
    for (int i = 0 ; i < 500 ; i+=5)
    {
        data.insert(i);
    }

    std::set<int>::iterator iter = data.lower_bound(33);
    std::cout << "expect 35" << std::endl;
    std::cout << "lower_bound 33 found: " << *iter << std::endl;

    iter = data.lower_bound(50);
    std::cout << "expect 50" << std::endl;
    std::cout << "lower_bound 50 found: " << *iter << std::endl;

    iter = data.upper_bound(33);
    std::cout << "expect 35" << std::endl;
    std::cout << "upper_bound 33 found: " << *iter << std::endl;

    iter = data.upper_bound(50);
    std::cout << "expect 55" << std::endl;
    std::cout << "upper_bound 50 found: " << *iter << std::endl;

    return 0;
}