#include <iostream>
#include <vector>
#include <map>
#include <cstdio>
#include <sstream>
#include <deque>

struct CSelection : public std::vector<std::deque<int> *>
{
    size_t size()
    {
        size_t retval = 0;
        for(auto &ptr : *this)
            retval += ptr->size();
        return retval;
    }
};
struct C : public std::map< std::vector<std::string>, std::deque<int> >
{
    // size_t size()
    // {
    //     size_t retval=0;
    //     for(auto &[k,v]: *this)
    //         retval += v.size();
    //     return retval;
    // }
    CSelection findall(const std::vector<std::vector<std::string>> &keys)
    {
        CSelection retval;
        for(auto &key:keys)
            if(this->count(key))
                retval.push_back(& (*this)[key]);
        return retval;
    }
    void emplace_back(int i)
    {
        std::vector<std::string> key(i, std::to_string(i));
        (*this)[key].emplace_back(i);
    }
};

int main() {
    C m;
    //std::map< std::vector<std::string>, std::deque<int> > m;
    m[{"hello","world"}]={1};
    m[{"momma"}]={2};
    m[{"a","b"}]={3};
    m[{"momma","zz"}]={4};
    m[{"zz","momma","b"}]={5};
    m[{"zz","momma","a"}]={6,7};
    m.emplace_back(4);
    
    fprintf(stderr,"m.size %ld\n", m.size());
    for(auto &[k,v]: m)
    {
        std::ostringstream strm;
        for(auto &kv: k)
            strm << ((&kv == &*k.begin())?"[":",") << kv;
        strm << "]";
        std::ostringstream strm2;
        for(auto &vv: v)
            strm2 << ((&vv == &*v.begin())?"[":",") << vv;
        strm2 << "]";
        fprintf(stderr,"k.size %ld, k %s, v.size %ld, v %s\n", k.size(), strm.str().c_str(), v.size(), strm2.str().c_str());
    }
    fprintf(stderr,"---\n");
    auto selection = m.findall({{"momma"},{"a","b"},{"zz","momma","a"}});
    for(auto &_v : selection)
    {
        auto &v = *_v;
        std::ostringstream strm2;
        for(auto &vv: v)
            strm2 << ((&vv == &*v.begin())?"[":",") << vv;
        strm2 << "]";
        fprintf(stderr,"v.size %ld, v %s\n", v.size(), strm2.str().c_str());
    }
    return 0;
}