Compilare: main.cpp: In function 'int exista(int)': main.cpp:16:14: warning: array subscript has type 'char' [-Wchar-subscripts] 16 | f[s[i]]++; | ~~~^ main.cpp:17:18: warning: array subscript has type 'char' [-Wchar-subscripts] 17 | if (f[s[i]] == 1) | ~~~^ main.cpp:29:16: warning: array subscript has type 'char' [-Wchar-subscripts] 29 | f[s[i-L]]--; | ~~~~~^ main.cpp:30:20: warning: array subscript has type 'char' [-Wchar-subscripts] 30 | if (f[s[i-L]] == 0) | ~~~~~^ main.cpp:32:14: warning: array subscript has type 'char' [-Wchar-subscripts] 32 | f[s[i]]++; | ~~~^ main.cpp:33:18: warning: array subscript has type 'char' [-Wchar-subscripts] 33 | if (f[s[i]] == 1) | ~~~^