Compilare: user.cpp: In function ‘int main()’: user.cpp:87:40: warning: array subscript has type ‘char’ [-Wchar-subscripts] for (int i = 1;i <= n;++i) ++r[a[i]],--r[b[i]]; ^ user.cpp:87:50: warning: array subscript has type ‘char’ [-Wchar-subscripts] for (int i = 1;i <= n;++i) ++r[a[i]],--r[b[i]]; ^ user.cpp:91:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[b[i]].push_back(i); ^ user.cpp:93:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] p[i] = v[a[i]].front(),v[a[i]].erase(v[a[i]].begin()); ^ user.cpp:93:38: warning: array subscript has type ‘char’ [-Wchar-subscripts] p[i] = v[a[i]].front(),v[a[i]].erase(v[a[i]].begin()); ^ user.cpp:93:52: warning: array subscript has type ‘char’ [-Wchar-subscripts] p[i] = v[a[i]].front(),v[a[i]].erase(v[a[i]].begin()); ^