Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:20:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<gr[nod].size();i++) ^ user.cpp: In function ‘void bfr(int, int)’: user.cpp:29:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<graf[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:64:15: warning: ‘nos’ may be used uninitialized in this function [-Wmaybe-uninitialized] bfr(nos,2); ^