Compilare: main.cpp: In function 'int main()': main.cpp:32:18: warning: array subscript has type 'char' [-Wchar-subscripts] 32 | freq[ch]++; | ^~ main.cpp:33:19: warning: array subscript has type 'char' [-Wchar-subscripts] 33 | leftt[ch]++; | ^~ main.cpp:44:25: warning: array subscript has type 'char' [-Wchar-subscripts] 44 | leftt[str[i]]--; | ^ main.cpp:48:25: warning: array subscript has type 'char' [-Wchar-subscripts] 48 | if(freq[ch] && ch != str[i]) | ^~ main.cpp:51:26: warning: array subscript has type 'char' [-Wchar-subscripts] 51 | freq[ch]--; | ^~ main.cpp:54:34: warning: array subscript has type 'char' [-Wchar-subscripts] 54 | if(leftt[ch2] > len - i - 1 - freq[ch2]) | ^~~ main.cpp:54:60: warning: array subscript has type 'char' [-Wchar-subscripts] 54 | if(leftt[ch2] > len - i - 1 - freq[ch2]) | ^~~ main.cpp:60:30: warning: array subscript has type 'char' [-Wchar-subscripts] 60 | freq[ch]++; | ^~