Compilare: user.cpp: In function ‘int cb(int, int)’: user.cpp:24:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(r+pas < lit[l].size()) ^ user.cpp:29:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(r!=0&&r!=lit[l].size()-2) ^ user.cpp: In function ‘void matrice_adiacenta()’: user.cpp:43:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<s.size()-1; i++) ^ user.cpp:46:48: 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:65:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<s.size(); i++) ^ user.cpp:79:17: warning: statement has no effect [-Wunused-value] for(poz;poz < lit[ult].size(); poz++) ^ user.cpp:79:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(poz;poz < lit[ult].size(); poz++) ^ user.cpp:92:12: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] afis(x); ^