Compilare: user.cpp:16:41: warning: overflow in implicit constant conversion [-Woverflow] int n,m,k,i,xx1,xx2,yy1,yy2,maxx(1LL<<63),j,nr; ^ user.cpp: In function ‘int main()’: user.cpp:43:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=linii.size();++i) ^ user.cpp:44:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1;j<=coloane.size();++j) ^