Compilare: user.cpp: In function ‘bool comp(int*)’: user.cpp:28:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(A[0]!=N.size()) return A[0]<N.size(); ^ user.cpp:28:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(A[0]!=N.size()) return A[0]<N.size(); ^ user.cpp: In function ‘int main()’: user.cpp:125:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(prod[0]>N.size()) break; ^