Compilare: main.cpp: In function 'int main()': main.cpp:33:18: warning: array subscript has type 'char' [-Wchar-subscripts] 33 | freq[ch]++; | ^~ main.cpp:34:19: warning: array subscript has type 'char' [-Wchar-subscripts] 34 | leftt[ch]++; | ^~ main.cpp:45:25: warning: array subscript has type 'char' [-Wchar-subscripts] 45 | leftt[str[i]]--; | ^ main.cpp:49:25: warning: array subscript has type 'char' [-Wchar-subscripts] 49 | if(freq[ch] && ch != str[i]) | ^~ main.cpp:52:26: warning: array subscript has type 'char' [-Wchar-subscripts] 52 | freq[ch]--; | ^~ main.cpp:55:34: warning: array subscript has type 'char' [-Wchar-subscripts] 55 | if(leftt[ch2] > len - i - 1 - freq[ch2]) | ^~~ main.cpp:55:60: warning: array subscript has type 'char' [-Wchar-subscripts] 55 | if(leftt[ch2] > len - i - 1 - freq[ch2]) | ^~~ main.cpp:61:30: warning: array subscript has type 'char' [-Wchar-subscripts] 61 | freq[ch]++; | ^~