Compilare: user.cpp: In function ‘int Find(int, int)’: user.cpp:22:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[x].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:107:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[comp.second].size(); i++) ^