739 - Soundex Indexing, uva

#include<iostream>
#include<cstdlib>
#include<cstdio>
#include<map>
#include<cstring>
#define db(a) cout << #a << " = " << a << endl;
#define foreach(it, l) for(typeof(l.begin()) it = l.begin(); it != l.end(); it++)
using namespace std;
map mapa;
string procesar_codigo(string palabra){
	string res = "";
	res += palabra[0];
	for(int i = 1; i < palabra.size() && res.size() < 5; i++){
		res += (mapa[palabra[i - 1]] != mapa[palabra[i]]) ? mapa[palabra[i]] : "";
	}
	if(res.size() == 5) res = res.substr(0,4);
	if(res.size() < 4)
	res += string(4 - res.size(), '0');
	return res;
}
int main(){
	string linea;
	mapa['B'] = "1"; mapa['C'] = "2"; mapa['J'] = "2"; mapa['D'] = "3"; mapa['N'] = "5";
	mapa['P'] = "1"; mapa['S'] = "2"; mapa['Q'] = "2"; mapa['T'] = "3"; mapa['R'] = "6";
	mapa['F'] = "1"; mapa['K'] = "2"; mapa['X'] = "2"; mapa['L'] = "4"; 
	mapa['V'] = "1"; mapa['G'] = "2"; mapa['Z'] = "2"; mapa['M'] = "5";
	
	mapa['A'] = ""; mapa['U'] = "";
	mapa['E'] = ""; mapa['Y'] = "";
	mapa['I'] = ""; mapa['W'] = "";
	mapa['O'] = ""; mapa['H'] = "";
	cout << "         NAME                     SOUNDEX CODE" << endl;
	while(cin >> linea){
		string res = string(9, ' ');
		res += linea;
		string aumento = string(25 - linea.size(),' ');
		res += aumento + procesar_codigo(linea);
		cout << res << endl;
	}
	string s = string(19,' ');
	s += "END OF OUTPUT";
	cout << s << endl;
	return 0;
}