Compilare: user.cpp: In function ‘std::tuple<int, int, int> ssmin(std::vector<int>)’: user.cpp:13:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<V.size();i++) ~^~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:45:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<V.size();i++) ~^~~~~~~~~ user.cpp:49:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<P.size();i++) ~^~~~~~~~~