Compilare: user.cpp: In function ‘int dfs(int, int)’: user.cpp:23:36: 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:109:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v[i].size(); ++ j) ^ user.cpp:120:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v[i].size(); ++ j) ^ /tmp/ccIDPckk.o: In function `main': user.cpp:(.text.startup+0xc4): warning: the `gets' function is dangerous and should not be used.