Compilare: user.cpp: In function ‘int main()’: user.cpp:62:65: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( ( A.size()*2 + int(mid1!=0) + int(add!=0)*2 ) < l && c[i]>0 ) ^ user.cpp:89:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<A.size();++i) G<<A[i]; ^ user.cpp:96:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<B.size();++i) G<<B[i]; ^