Compilare: main.cpp: In function 'int main()': main.cpp:71:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 71 | for(int i=0;i<v.size();i++) | ~^~~~~~~~~ main.cpp:77:13: warning: unused variable 'i' [-Wunused-variable] 77 | for(int i:v) | ^