Compilare: user.cpp: In function ‘int bfs()’: user.cpp:27:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<L[nod].size(); i++) ^ user.cpp: In function ‘void dfs(int, int)’: user.cpp:43:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<L[nod].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:70:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<L[n].size(); i++) ^