Compilare: user.cpp: In function ‘void matrice_adiacenta()’: user.cpp:28:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<s.size()-1; i++) ^ user.cpp:31:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int poz =0; poz< lit[ult].size(); poz++) ^ user.cpp: In function ‘int main()’: user.cpp:50:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<s.size(); i++) ^ user.cpp:62:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int poz =0; poz< lit[ult].size(); poz++) ^ user.cpp:78:12: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] afis(x); ^