Compilare: main.cpp: In function 'int main()': main.cpp:30:32: warning: array subscript has type 'char' [-Wchar-subscripts] 30 | if (buc[bucata][s[i]] == 0) { | ~~~^ main.cpp:31:27: warning: array subscript has type 'char' [-Wchar-subscripts] 31 | nr_buc[s[i]]++; | ~~~^ main.cpp:33:28: warning: array subscript has type 'char' [-Wchar-subscripts] 33 | buc[bucata][s[i]]++; | ~~~^