Compilare: main.cpp: In function 'int main()': main.cpp:26:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | for(int i=0; i<b.size(); i++) fout << "pop(1) push(2, " << b[i] << ") "; | ~^~~~~~~~~