Compilare: user.cpp: In function ‘int main()’: user.cpp:33:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] while (!d[st[i]].empty() && d[st[i]].front().poz < i-k) ^ user.cpp:33:44: warning: array subscript has type ‘char’ [-Wchar-subscripts] while (!d[st[i]].empty() && d[st[i]].front().poz < i-k) ^ user.cpp:34:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] d[st[i]].pop_front(); ^ user.cpp:35:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (d[st[i]].empty()) ^ user.cpp:37:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] else sol[i] = d[st[i]].front().x + 1; ^ user.cpp:42:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] while (!d[dr[i]].empty() && d[dr[i]].back().x <= aux.x) ^ user.cpp:42:44: warning: array subscript has type ‘char’ [-Wchar-subscripts] while (!d[dr[i]].empty() && d[dr[i]].back().x <= aux.x) ^ user.cpp:43:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] d[dr[i]].pop_back(); ^ user.cpp:44:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] d[dr[i]].push_back(aux); ^