Compilare: main.cpp: In function 'int main()': main.cpp:25:103: warning: array subscript has type 'char' [-Wchar-subscripts] 25 | long long ceva = 1LL * (s.size() - i - 2) * (s.size() - i - 1) / 2 + s.size() - i - 1 - f[s[i]] - cnt[s[i]]; | ^ main.cpp:25:115: warning: array subscript has type 'char' [-Wchar-subscripts] 25 | long long ceva = 1LL * (s.size() - i - 2) * (s.size() - i - 1) / 2 + s.size() - i - 1 - f[s[i]] - cnt[s[i]]; | ^ main.cpp:27:15: warning: array subscript has type 'char' [-Wchar-subscripts] 27 | f[s[i]] += s.size() - i - 1; | ^ main.cpp:28:17: warning: array subscript has type 'char' [-Wchar-subscripts] 28 | cnt[s[i]]++; | ^ main.cpp:12:12: warning: unused variable 'j' [-Wunused-variable] 12 | int i, j; | ^