Compilare: user.cpp: In function ‘bool verif(int)’: user.cpp:17:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[x].size(); ++i) ^ user.cpp: In function ‘void dfs(int)’: user.cpp:26:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod].size(); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:54:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < rasp.size(); ++i) ^