Compilare: main.cpp: In function 'int main()': main.cpp:29:17: warning: array subscript has type 'char' [-Wchar-subscripts] 29 | f[s[0][i]][0]++; | ~~~~~~^ main.cpp:53:22: warning: array subscript has type 'char' [-Wchar-subscripts] 53 | ans += f[letter][schema[grupa % 2][i]]; | ^~~~~~ main.cpp:54:39: warning: array subscript has type 'char' [-Wchar-subscripts] 54 | ans += 1LL * (grupa - 1) * (f[letter][0] + f[letter][1]); | ^~~~~~ main.cpp:54:54: warning: array subscript has type 'char' [-Wchar-subscripts] 54 | ans += 1LL * (grupa - 1) * (f[letter][0] + f[letter][1]); | ^~~~~~