Compilare: user.cpp: In function ‘int main()’: user.cpp:43:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(gr[i].size()==c) ^ user.cpp:56:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(gr[i].size()>el) ^ user.cpp:65:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(gr[i].size()>=el&&i!=imax) ^ user.cpp:10:24: warning: unused variable ‘ok’ [-Wunused-variable] int p,n,c,nod,nr,x,ok,kk,imax,ima,el; ^ user.cpp:10:27: warning: unused variable ‘kk’ [-Wunused-variable] int p,n,c,nod,nr,x,ok,kk,imax,ima,el; ^ user.cpp:74:32: warning: ‘imax’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<ima<<" "<<imax; ^ user.cpp:74:18: warning: ‘ima’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<ima<<" "<<imax; ^