Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:13:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < v[nod].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:27:10: warning: unused variable ‘i’ [-Wunused-variable] int n,m,i,j,x,y; ^ user.cpp:43:17: warning: ignoring return value of ‘int system(const char*)’, declared with attribute warn_unused_result [-Wunused-result] system("PAUSE"); ^