Compilare: main.cpp: In function 'int main()': main.cpp:44:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<aux.size();i++) ~^~~~~~~~~~~ main.cpp:62:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<s.size();i++) ~^~~~~~~~~ main.cpp:50:9: warning: unused variable 'n' [-Wunused-variable] int n=s.size(); ^