Compilare: main.cpp:2:0: warning: ignoring #pragma GCC optimze [-Wunknown-pragmas] #pragma GCC optimze ("O3") main.cpp:3:0: warning: ignoring #pragma GCC optimze [-Wunknown-pragmas] #pragma GCC optimze ("O1") main.cpp: In function 'void add(std::__cxx11::string, int, bool)': main.cpp:37:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < s.size(); i++) { ~~^~~~~~~~~~