Compilare: user.cpp: In function ‘int main()’: user.cpp:43:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(g[i].size()==c) ^ user.cpp:57:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<gr[j].size();k++) ^ user.cpp:71:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(kk==c-gr[i].size()) ^ user.cpp:10:24: warning: unused variable ‘ok’ [-Wunused-variable] int p,n,c,nod,nr,x,ok,kk; ^ user.cpp:10:27: warning: ‘kk’ may be used uninitialized in this function [-Wmaybe-uninitialized] int p,n,c,nod,nr,x,ok,kk; ^