Compilare: main.cpp: In function 'void atribuim_valori(std::__cxx11::string)': main.cpp:16:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long i=2;i<var.length();i++) ~^~~~~~~~~~~~~ main.cpp: In function 'void procesare_functie(std::__cxx11::string)': main.cpp:30:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long i=0;i<fct.length();i++) ~^~~~~~~~~~~~~ main.cpp: In function 'long long int get_nr(std::__cxx11::string, long long int&)': main.cpp:44:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<expr.length() and isdigit(expr[i])) ~^~~~~~~~~~~~~~ main.cpp: In function 'long long int rezolva_functia(char, std::vector<long long int>)': main.cpp:66:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long i=0;i<expr.length();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:164:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long i=0;i<expr.length();i++) ~^~~~~~~~~~~~~~