Compilare: main.cpp: In function 'int getNumber(std::__cxx11::string, int&)': main.cpp:11:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (s[i] >= '0' && s[i] <= '9' && i < s.size()) { ~~^~~~~~~~~~ main.cpp: In function 'int solve(int, int)': main.cpp:26:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < f.size(); i++) { ~~^~~~~~~~~~