Compilare: main.cpp: In function 'int main()': main.cpp:36:8: warning: unused variable 'ok' [-Wunused-variable] bool ok=false; ^~ main.cpp:65:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i< V.size(); i++){ ~^~~~~~~~~~ main.cpp:69:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i< V.size(); i++){ ~^~~~~~~~~~