Compilare: main.cpp: In function 'std::pair<int, int> execute(std::__cxx11::string&, std::__cxx11::string&)': main.cpp:59:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (current.index == to_match.size()) { ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:96:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define RESIZE(STR, LENGTH) if (STR.size() != LENGTH) STR = STR.substr(0, LENGTH) main.cpp:98:12: RESIZE(match_in, l1); ~~~~~~~~~~~ main.cpp:98:5: note: in expansion of macro 'RESIZE' RESIZE(match_in, l1); ^~~~~~ main.cpp:96:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define RESIZE(STR, LENGTH) if (STR.size() != LENGTH) STR = STR.substr(0, LENGTH) main.cpp:99:12: RESIZE(to_match, l2); ~~~~~~~~~~~ main.cpp:99:5: note: in expansion of macro 'RESIZE' RESIZE(to_match, l2); ^~~~~~