Compilare: user.cpp: In function ‘int main()’: user.cpp:24:6: warning: array subscript has type ‘char’ [-Wchar-subscripts] b[x].insert(i); ^ user.cpp:25:6: warning: array subscript has type ‘char’ [-Wchar-subscripts] b[y].insert(i); ^ user.cpp:26:8: warning: array subscript has type ‘char’ [-Wchar-subscripts] ++a[x]; ++a[y]; ^ user.cpp:26:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] ++a[x]; ++a[y]; ^ user.cpp:35:11: warning: array subscript has type ‘char’ [-Wchar-subscripts] poz=*b[q].begin(); ^ user.cpp:36:6: warning: array subscript has type ‘char’ [-Wchar-subscripts] b[q].erase(*b[q].begin()); ^ user.cpp:36:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] b[q].erase(*b[q].begin()); ^ user.cpp:39:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] b[ z[poz].second ].erase(poz); ^ user.cpp:41:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] else b[ z[poz].first ].erase(poz); ^ user.cpp: In function ‘bool cmp(int, int)’: user.cpp:49:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] return a[s[q]]<a[s[w]]; ^ user.cpp:49:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] return a[s[q]]<a[s[w]]; ^