Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:16:33: 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:27:9: warning: unused variable ‘j’ [-Wunused-variable] int i, j, n, m, x, y; ^