Compilare: main.cpp: In function 'bool fact()': main.cpp:50:30: warning: array subscript has type 'char' [-Wchar-subscripts] 50 | return (val[s[ind - 1]] + ok) % 2; | ~~~~~~~~~^ main.cpp: In function 'int main()': main.cpp:105:13: warning: array subscript has type 'char' [-Wchar-subscripts] 105 | val[ch] = (val[ch] + 1) % 2; | ^~ main.cpp:105:24: warning: array subscript has type 'char' [-Wchar-subscripts] 105 | val[ch] = (val[ch] + 1) % 2; | ^~ main.cpp:92:15: warning: unused variable 'j' [-Wunused-variable] 92 | int n, i, j; | ^