Compilare: user.cpp: In function ‘void tarjan(int)’: user.cpp:28:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();i++) ^ user.cpp: In function ‘void bf(int)’: user.cpp:92:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[x].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:124:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[i].size();j++) ^ user.cpp:160:28: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] muchie(x,ge[i]); ^