nome para numero - 2097 URI

#include <bits/stdc++.h>

using namespace std;

map<string,long long>mapa;
map<string,long long>::iterator it;
string numero,palavra;
long long sum,resp;
vector<long long>vet;
vector<string>v;

void preencheMapa(){
    mapa.insert(make_pair("zero",0));
    mapa.insert(make_pair("um",1));
    mapa.insert(make_pair("dois",2));
    mapa.insert(make_pair("tres",3));
    mapa.insert(make_pair("quatro",4));
    mapa.insert(make_pair("cinco",5));
    mapa.insert(make_pair("seis",6));
    mapa.insert(make_pair("sete",7));
    mapa.insert(make_pair("oito",8));
    mapa.insert(make_pair("nove",9));
    mapa.insert(make_pair("dez",10));
    mapa.insert(make_pair("onze",11));
    mapa.insert(make_pair("doze",12));
    mapa.insert(make_pair("treze",13));
    mapa.insert(make_pair("quatorze",14));
    mapa.insert(make_pair("quinze",15));
    mapa.insert(make_pair("dezesseis",16));
    mapa.insert(make_pair("dezessete",17));
    mapa.insert(make_pair("dezoito",18));
    mapa.insert(make_pair("dezenove",19));
    mapa.insert(make_pair("vinte",20));
    mapa.insert(make_pair("trinta",30));
    mapa.insert(make_pair("quarenta",40));
    mapa.insert(make_pair("cinquenta",50));
    mapa.insert(make_pair("sessenta",60));
    mapa.insert(make_pair("setenta",70));
    mapa.insert(make_pair("oitenta",80));
    mapa.insert(make_pair("noventa",90));
    mapa.insert(make_pair("cem",100));
    mapa.insert(make_pair("cento",100));
    mapa.insert(make_pair("duzentos",200));
    mapa.insert(make_pair("trezentos",300));
    mapa.insert(make_pair("quatrocentos",400));
    mapa.insert(make_pair("quinhentos",500));
    mapa.insert(make_pair("seiscentos",600));
    mapa.insert(make_pair("setecentos",700));
    mapa.insert(make_pair("oitocentos",800));
    mapa.insert(make_pair("novecentos",900));
    mapa.insert(make_pair("mil",1000));
    mapa.insert(make_pair("milhao",1000000));
    mapa.insert(make_pair("milhoes",1000000));
    mapa.insert(make_pair("bilhao",1000000000));
    mapa.insert(make_pair("bilhoes",100000000));
    mapa.insert(make_pair("trilhao",1000000000000));
    mapa.insert(make_pair("trilhoes",1000000000000));
}

int main()
{
    preencheMapa();

    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);

    while(getline(cin,numero)){

        stringstream ss;
        ss << numero;
        while( ss >> palavra )
            v.push_back( palavra );

        sum = 0;
        resp = 0;

            for(int i=0;i<v.size();i++){

                ///printf("%s\n",v[i].c_str());

                if(v[i]!="e"){

                    if(v[i]!="mil" &&  v[i]!="milhao" && v[i]!="milhoes" &&
                       v[i]!="bilhao" && v[i]!="bilhoes" && v[i]!="trilhao" &&
                       v[i]!="trilhoes" ){

                    it = mapa.find(v[i]);

                    if(vet.size() > 0){
                        vet.pop_back();
                    }

                    if(it!= mapa.end()){ /// achou a chave, faz o somatório

                        sum += it->second;
                        vet.push_back(sum);
                    }

                }else if(v[i]=="mil" ||  v[i]=="milhao" || v[i]=="milhoes" ||
                       v[i]=="bilhao" || v[i]=="bilhoes" || v[i]=="trilhao" ||
                       v[i]=="trilhoes" ){ /// achei a operação de transformação, multiplico


                    if(vet.size() > 0)
                        vet.pop_back();

                    if(v[0]=="mil" || v[0]=="milhao" || v[0]=="bilhao" || v[0]=="trilhao"){
                        sum++;
                    }

                    if(v[i]=="bilhao" || v[i]=="bilhoes"){

                        sum *= 1000000000;
                        resp += sum;
                        sum = 0;
                    }

                    if(v[i]=="trilhao" || v[i]=="trilhoes"){

                        sum *= 1000000000000;
                        resp += sum;
                        sum = 0;
                    }


                    if(v[i]=="milhao" || v[i]=="milhoes"){

                        sum *= 1000000;
                        resp += sum;
                        sum = 0;
                    }

                    if(v[i]=="mil"){

                        sum *= 1000;
                        resp += sum;
                        sum = 0;
                    }

                    if(v[i]=="cem" || v[i]=="cento"){

                        sum *= 100;
                        resp += sum;
                        sum = 0;
                    }
                }
            }
        }

        for(int i=0;i<vet.size();i++){
            resp+=vet[i]; /// vetor com as unidades
        }

        printf("%llu\n",resp);
        vet.clear();
        v.clear();
}
    return 0;
}