Compilare: main.cpp: In function 'int main()': main.cpp:13:9: warning: array subscript has type 'char' [-Wchar-subscripts] f[s[i]]++; ^ main.cpp:14:13: warning: array subscript has type 'char' [-Wchar-subscripts] if (f[s[i]]==1) ^ main.cpp:17:10: warning: array subscript has type 'char' [-Wchar-subscripts] f[s[p]]--; //eliminam pe primul din coada ^ main.cpp:18:14: warning: array subscript has type 'char' [-Wchar-subscripts] if (f[s[p]]==0) ^