#include <iostream>
#include <map>

void remove (std::map<int,int> &mapa, int n)
{
    auto a = mapa.begin();
    for(auto b = mapa.begin(); b!= mapa.end(); ++b )
    {

        if(a->second >= n)
        {
            mapa.erase(b);
        }
    }
}

int main() {
    std::map<int, int> map {{7, 1} , {3,8} , {5,7} , {1,4} , {4,5} , {8,3}};
    remove(map, 5);
    for (auto pair: map)
    {
        std::cout << pair.first << " " << pair.second << std::endl;
    }
}