Compilare: main.cpp: In function 'int main()': main.cpp:46:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<aux.size();k++) ~^~~~~~~~~~~ main.cpp:68:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<aux.size();j++) ~^~~~~~~~~~~ main.cpp:74:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<aux.size();j++) ~^~~~~~~~~~~ main.cpp:87:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<stiva.size();i++) ~^~~~~~~~~~~~~