Compilare: main.cpp: In function 'bool cmp(MUCHIE, MUCHIE)': main.cpp:20:34: warning: suggest parentheses around '&&' within '||' [-Wparentheses] return (x.e < y.e || x.e == y.e && x.c < y.c); ~~~~~~~~~~~^~~~~~~~~~~~ main.cpp: In function 'std::pair<int, int> calculez_cost(std::__cxx11::string)': main.cpp:25:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < _s.size(); ++i) { ~~^~~~~~~~~~~