Compilare: main.cpp: In function 'bool constanta()': main.cpp:86:18: warning: array subscript has type 'char' [-Wchar-subscripts] 86 | r = f[s[i]]; | ~~~^ main.cpp: In function 'int main()': main.cpp:101:11: warning: array subscript has type 'char' [-Wchar-subscripts] 101 | f[t] = !f[t]; | ^ main.cpp:101:19: warning: array subscript has type 'char' [-Wchar-subscripts] 101 | f[t] = !f[t]; | ^