std::string uri_encode(const std::string &in);
std::string uri_decode(const std::string &in);
-std::string encode_int(long long n);
+std::string encode_int(long long n, int base=10);
void dict_output(std::ostream &o, std::map<std::string, std::string> dict);
long long parse_int(const std::string &s);