#include <iostream>
#include <algorithm>
inline bool not_space(char c){
return c != ' ' && ( 9 > c || c > 13 );
}
inline bool my_isspace(char c){
return std::isspace(static_cast<unsigned char>(c));
}
template<typename FN>
auto find_if(std::string & s, FN fn){
return std::find_if(s.begin(), s.end(), fn);
}
template<typename FN>
auto rfind_if(std::string & s, FN fn){
return std::find_if(s.rbegin(), s.rend(), fn).base();
}
inline void ltrim(std::string &s) {
s.erase(s.begin(), find_if(s, not_space));
}
inline void rtrim(std::string &s) {
s.erase(rfind_if(s, not_space), s.end());
}
std::string trim(std::string&& _s){
std::string s{_s};
ltrim(s);
rtrim(s);
return s;
}
int main(){
std::cout << '"' << trim(" sdf ") << '"';
}
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