Compilare: user.cpp: In function ‘int main()’: user.cpp:25:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(F[A[i]]==0) k++; ^ user.cpp:26:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] F[A[i]]++; ^ user.cpp:30:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(F[A[i]]!=0) F[A[i]]++,secv.push_back(A[i]); ^ user.cpp:30:34: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(F[A[i]]!=0) F[A[i]]++,secv.push_back(A[i]); ^ user.cpp:35:45: warning: array subscript has type ‘char’ [-Wchar-subscripts] secv.push_back(A[i]); F[A[i]]++; ^ user.cpp:38:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(!secv.empty() && secv.size()>lmax) ^ user.cpp:41:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<=secv.size()-1;j++) ^